Nouns, Articles, and Cases
Nouns in Esperanto All Esperanto nouns end in -o . This is absolute and invariable — there are no exceptions. Any word functioning as a noun carries the -o ending. libro (book) amiko (friend) urbo (city) lando (country) amo (love) verdo (greenness — even abstract qualities are nouns with -o) Nouns have no grammatical gender in Esperanto. A libro is neither masculine nor feminine — it is simply a book....