Lesson 4: Prefixes — mal-, ek-, re-, dis-, mis-

Overview

Esperanto's affixes are one of its greatest strengths. A small number of prefixes and suffixes, each with a clear and consistent meaning, can be attached to any compatible root to create thousands of new words. This lesson covers five important prefixes: mal- (opposite), ek- (sudden start or brief action), re- (again or back), dis- (apart or scattered), and mis- (wrongly or incorrectly).

Mastering these five prefixes alone will dramatically expand your active vocabulary. Instead of memorizing both bona and its opposite separately, you derive malbona automatically. Instead of looking up the word "misunderstand", you combine mis- + kompreni on the fly. This productive word-building is one of the features that makes Esperanto so efficient to learn.

Learning Objectives

• Apply mal- to adjectives and verbs to express exact opposites
• Use ek- to convey the sudden beginning of an action
• Use re- to express repetition or return movement
• Use dis- to convey dispersal or separation
• Use mis- to indicate that an action was done incorrectly

Vocabulary

Root	+ Prefix	English	Word class
bona (good)	malbona	bad	adjective
granda (big)	malgranda	small	adjective
varma (warm)	malvarma	cold	adjective
rapida (fast)	malrapida	slow	adjective
ami (to love)	malami	to hate	verb
ĝoji (to be glad)	malĝoji	to be sad	verb
fermi (to close)	malfermi	to open	verb
iri (to go)	ekiri	to set off / start going	verb
kuri (to run)	ekkuri	to break into a run	verb
ridi (to laugh)	ekridi	to burst out laughing	verb
dormi (to sleep)	ekdormi	to fall asleep	verb
brili (to shine)	ekbrili	to start shining / flash	verb
veni (to come)	reveni	to come back / return	verb
doni (to give)	redoni	to give back	verb
legi (to read)	relegi	to re-read	verb
komenci (to begin)	rekomenci	to start over	verb
konstrui (to build)	rekonstrui	to rebuild	verb
sendi (to send)	dissendi	to broadcast / send out	verb
rompi (to break)	disrompi	to shatter / break apart	verb
iri (to go)	disiri	to scatter / go in all directions	verb
lerni (to learn)	mislerni	to learn incorrectly	verb
kompreni (to understand)	miskompreni	to misunderstand	verb
uzi (to use)	misuzi	to misuse / abuse	verb
diri (to say)	misdiri	to misspeak	verb
traduki (to translate)	mistraduki	to mistranslate	verb

Grammar Focus

Pattern 1: mal- — the opposite prefix

mal- creates the precise antonym of any adjective or verb. It is productive with virtually all adjectives and many verbs.

With adjectives:

• bona → malbona (good → bad)
• granda → malgranda (big → small)
• varma → malvarma (warm → cold)
• rapida → malrapida (fast → slow)
• juna → maljuna (young → old)
• riĉa → malriĉa (rich → poor)
• facila → malfacila (easy → difficult)
• proksima → malproksima (near → far)
• alta → malalta (tall → short)
• nova → malnova (new → old/used)

With verbs:

• ami → malami (to love → to hate)
• ĝoji → malĝoji (to be glad → to be sad)
• fermi → malfermi (to close → to open)
• komenci → malkomenci (to begin → to end/terminate)
• helpi → malhelpi (to help → to hinder)

Full sentence examples:

• La vetero estas malvarma hodiaŭ — ni restu hejme. — The weather is cold today — let's stay home.
• Li malamis sian najbaron, ĉar ĉiam li ludis laŭtan muzikon. — He hated his neighbor, because he always played loud music.
• Malfermu la fenestron, bonvolu — estas varme ĉi tie! — Open the window, please — it's warm in here!

Common mistake: Using mal- to negate something that isn't a true opposite. ne bona (not good) is different from malbona (positively bad). Use ne for simple negation, and mal- only when an opposite truly exists.

Pattern 2: ek- — sudden start or brief action

ek- marks the beginning of an action (inchoative aspect) or a brief, sudden occurrence. It is especially common with verbs of motion, sound, and emotion.

• iri → ekiri (to set off, to start going)
• kuri → ekkuri (to break into a run)
• ridi → ekridi (to burst out laughing)
• dormi → ekdormi (to fall asleep)
• brili → ekbrili (to start shining, to flash)
• paroli → ekparoli (to start speaking, to speak up)
• plori → ekplori (to burst into tears)
• kanti → ekkanti (to burst into song)
• ami → ekami (to fall in love)

Full sentence examples:

• Kiam mi diris la ŝercon, ĉiuj ekridis. — When I told the joke, everyone burst out laughing.
• Ŝi ekamis lin je la unua renkontiĝo. — She fell in love with him at the first meeting.
• La suno ekbrilis post la pluvo. — The sun started shining after the rain.
• Ekiris la grupo je la oka matene. — The group set off at eight in the morning.

Common mistake: Using ek- for ongoing or habitual actions. Li ĉiam ekiras frue is awkward — ek- implies starting, not a regular pattern. Say Li ĉiam foriris frue (He always left early).

Pattern 3: re- — again or back

re- has two related meanings: doing something again (repetition) or doing something back (return movement).

Repetition sense:

• legi → relegi (to re-read)
• fari → refari (to redo)
• komenci → rekomenci (to start over)
• konstrui → rekonstrui (to rebuild)
• skribi → reskribi (to rewrite)

Return/back sense:

• veni → reveni (to come back, return)
• doni → redoni (to give back, return something)
• iri → reiri (to go back)
• porti → reporti (to bring back)
• telefoni → retelefoni (to call back)

Full sentence examples:

• Post la vojaĝo ŝi revenis ĝoja kaj energiplenа. — After the trip she returned happy and full of energy.
• Mi relegis ĉi tiun libron trifoje — ĝi estas tiel bona. — I re-read this book three times — it is so good.
• Redonу al mi mian krajонon, bonvolu! — Give me back my pencil, please!
• Post la fajro, la komunumo rekonstruis la pontоn. — After the fire, the community rebuilt the bridge.

Pattern 4: dis- — apart, scattered, in all directions

dis- implies dispersion, separation, or sending in multiple directions simultaneously.

• sendi → dissendi (to broadcast, send to many)
• rompi → disrompi (to shatter, break into pieces)
• iri → disiri (to disperse, go in all directions)
• doni → disdoni (to distribute, hand out)
• ŝiri → disŝiri (to tear apart)
• fali → disfali (to fall apart, collapse)
• lerni → dislerni (to spread knowledge widely)

Full sentence examples:

• Post la kunveno ĉiuj disiris en malsamajn direktojn. — After the meeting everyone dispersed in different directions.
• La organizo dissendis la novaĵojn al ĉiuj membroj. — The organization broadcast the news to all members.
• La malforta branĉo disrомpis sub la pezo de la neĝo. — The weak branch shattered under the weight of the snow.
• La instruisto disdonis la ekzamenajn paperojn. — The teacher distributed the exam papers.

Pattern 5: mis- — wrongly, incorrectly

mis- indicates that an action was performed incorrectly, erroneously, or in the wrong way.

• kompreni → miskompreni (to misunderstand)
• uzi → misuzi (to misuse, abuse)
• diri → misdiri (to misspeak)
• traduki → mistraduki (to mistranslate)
• lerni → mislerni (to learn incorrectly)
• kalkuli → miskalkuli (to miscalculate)
• konduti → miskonduti (to misbehave)
• skribi → misskribi (to misspell, write incorrectly)

Full sentence examples:

• Mi miskomprenis la demandon kaj respondis malĝuste. — I misunderstood the question and answered incorrectly.
• Ĉi tiu vorto estas misskribita en la teksto. — This word is misspelled in the text.
• La komputilprogramo miskalkulos la rezulton, se vi enigos malgustajn datumojn. — The computer program will miscalculate the result if you enter incorrect data.

Dialogue

Tomo kaj Yuki revenas de vojaĝo. (Tomo and Yuki return from a trip.)

Esperanto	English
Tomo: Fine ni revenis! La vojaĝo estis longa.	We finally returned! The journey was long.
Yuki: Jes, sed tre interesa. Mi ekamis tiun urbon tuj!	Yes, but very interesting. I fell in love with that city immediately!
Tomo: Mi ankaŭ. Sed la vetero estis malvarma — mi ne atendis tion.	Me too. But the weather was cold — I didn't expect that.
Yuki: Ha, mi mislegis la veterprognozon. Estis skribita "varma", sed mi legis "malvarma". Kontraŭe!	Ha, I misread the weather forecast. It was written "warm", but I read "cold". The opposite!
Tomo: Mi miskomprenис la hoteliston kaj prenis malĝustan ĉambron.	I misunderstood the hotel keeper and took the wrong room.
Yuki: Ĉu vere? Kion vi faris?	Really? What did you do?
Tomo: Mi rekomencis la procezon kaj klarigis la situacion. Fine ili disdonis ĉambrajn ŝlosilojn al ĉiuj ĝuste.	I started the process over and explained the situation. Finally they distributed room keys to everyone correctly.
Yuki: Almenaŭ ĉio bone finiĝis. Ĉu vi relegus la libron pri tiu urbo? Ĝi estis tre bona.	At least everything ended well. Would you re-read the book about that city? It was very good.
Tomo: Eble. Sed unue mi bezonas ekdormi — mi estas malenergia!	Maybe. But first I need to fall asleep — I am low on energy!

Practice

Exercise 1: Add the Correct Prefix

Add mal-, ek-, re-, dis-, or mis- to create the requested meaning.

1. ___veni = to come back
2. ___bona = bad
3. ___kompreni = to misunderstand
4. ___ridi = to burst out laughing
5. ___sendi = to broadcast
6. ___fermi = to open
7. ___skribi = to rewrite
8. ___konduti = to misbehave
9. ___dormi = to fall asleep
10. ___iri = to scatter/disperse

Answers: 1.re 2.mal 3.mis 4.ek 5.dis 6.mal 7.re 8.mis 9.ek 10.dis

Exercise 2: Translate Using Prefixes

Translate each phrase using an appropriate prefix + root combination.

1. She fell in love with the city at first sight.
2. The audience burst into applause.
3. Please give me back my umbrella.
4. The building collapsed during the storm.
5. He misused his position of authority.
6. The news was broadcast to thousands of listeners.
7. The cold weather made everyone sad.

Sample answers:

1. Ŝi ekamis la urbon ĉe la unua vido.
2. La publiko ekaplodis.
3. Bonvolu redoni al mi mian ombrelon.
4. La konstruaĵo disfalis dum la ŝtormo.
5. Li misuзis sian postenon de aŭtoritato.
6. La novaĵo dissendis al miloj da aŭskultantoj.
7. La malvarma vetero malĝojigis ĉiujn.

Exercise 3: Build a Word Family

Starting from the root diri (to say), create words using the prefixes learned and any suffix you know. Write a sentence using each word.

Example: diri → misdiri (to misspeak) → Mi misdiras kelkfoje kiam mi estas nervoza.

Try: re + diri, mal + diri (does this make sense?), dis + diri.

Cultural Note

The prefix mal- is so central to Esperanto that it has become something of a cultural touchstone. The famous Esperanto slogan "Malami neniun" (Hate no one) and the ideal of malamo kontraŭ malamo (hate against hate) appear in Esperanto literature and speeches going back to Zamenhof's early writings. Zamenhof himself suffered from antisemitism and dreamed that a neutral shared language could reduce inter-group hostility. The word malami — literally "to un-love" — captures something of that vision: hatred is love reversed, something that could theoretically be reversed back.