bonaj

Bonaj is the plural form of the Esperanto adjective bona, meaning "good." It is used to describe plural nouns and follows the language’s regular adjective agreement: the base form bona is used in the singular, and adding the plural ending -j yields bonaj for plural usage.

Formation and usage: In Esperanto, adjectives agree with the number of the noun they modify. The singular form is bona; the plural form is bonaj. Examples include bonaj amikoj (good friends) and bonaj tagoj (good days). Adjectives typically precede the noun, as in bonaj homoj, and may be used with definite articles when needed, for example la bonaj homoj (the good people).

Comparison: Comparative and superlative forms are formed with the adverbs pli (more) and plej (most) placed before the adjective. Thus, pli bona means “better,” and plej bona means “the best.” In the plural, these become pli bonaj and plej bonaj, for example, pli bonaj amikoj or la plej bonaj homoj.

Notes: Bonaj is specifically a plural form and does not stand alone as a separate concept; it is part of the standard Esperantist adjective paradigm. Other related forms include bona (singular) and bono (the noun meaning goodness).