bildajn

Bildajn is the accusative plural form of the Esperanto adjective bilda, meaning image-related or pictorial. It is used to modify plural nouns that are in the accusative case. In Esperanto, adjectives agree with the noun in number, and the accusative suffix -n attaches to the noun and, when the noun is in the accusative, also to the preceding adjective. For example, belajn bildojn means “beautiful pictures,” while bildajn aferojn means “image-related matters.”

The form bildajn specifically marks a plural noun phrase that is the direct object of a verb or part of a prepositional construction requiring the accusative. It thus appears in phrases such as bildajn aferojn (image-related matters) or bildajn informojn (image-related information). The corresponding nominative plural form is bildaj, used when the noun is in the subject position, e.g., bildaj aferoj (image-related matters).

Etymology and relation to other forms: bildajn derives from the root bild- meaning image or picture, with the ordinary Esperanto adjective suffix -a to form bilda (“image-related”), and the standard accusative plural ending -n-appended to the adjective as part of the noun phrase. Related forms include bildaj (nominative plural), bildajn (accusative plural), and the singular equivalents bildan (accusative singular) and bilda (nominative singular).

See also: Esperanto grammar, adjectives, accusative case, root bild- (image).