Editing Esperanto grammar (section)

==Nouns and adjectives==
Nouns end with the suffix ''-o''. To make a word plural, the suffix ''-j'' is added to the ''-o''. Without this suffix, a [[countable noun]] is understood to be singular. [[Direct object]]s take an [[accusative case]] suffix ''-n,'' which goes after any plural suffix; the resulting pluralized accusative sequence ''-ojn'' rhymes with English ''c'''oin'''.''

Names may be pluralized when there is more than one person of that name being referenced:

:''la frat'''oj''' Feliks'''o''' kaj Leon'''o''' Zamenhof'''oj''''' (the brothers Felix and Leon Zamenhof)<ref>Edvardo Wiesenfeld, ed. (1935: 263) ''Verkoj de FeZ'', Literatura Mondo Budapest.</ref>

Adjectives [[agreement (linguistics)|agree]] with nouns. That is, they are generally plural if the noun that they [[Grammatical modifier|modify]] is plural, and accusative if the noun is accusative. Compare ''bona tago; bonaj tagoj; bonan tagon; bonajn tagojn'' (good day/days). (The sequence ''-ajn'' rhymes with English ''f'''ine'''.'') This requirement allows for the word orders ''adjective&ndash;noun'' and ''noun&ndash;adjective'', even when two noun phrases are adjacent in [[subject–object–verb]] or [[verb–subject–object]] clauses:

:''la knabino feliĉa'''n''' knabo'''n''' kisis'' (the girl kissed a happy boy)
:''la knabino feliĉa knabo'''n''' kisis'' (the happy girl kissed a boy).

Agreement clarifies the [[syntax]] in other ways as well. Adjectives take the plural suffix when they modify more than one noun, even when those nouns are singular:
:''ruĝa'''j''' domo kaj aŭto'' (a red house and [a red] car)
:''ruĝa domo kaj aŭto'' (a red house and a car).

A [[predicative adjective]] does not take the accusative case suffix even when the noun that it modifies does:
:''mi farbis la pordo'''n''' ruĝa'''n''''' (I painted the red door)
:''mi farbis la pordo'''n''' ruĝa'' (I painted the door red).