undicesimo

Undicesimo is the Italian masculine singular form of the ordinal number meaning “eleventh.” It agrees with the noun it modifies, with feminine forms undicesima (singular), undicesimi (masculine plural), and undicesime (feminine plural). It is used to indicate position or order in a sequence, such as l’undicesimo giorno (the eleventh day), l’undicesimo capitolo, or l’undicesimo piano (the eleventh floor). In historical or calendrical contexts it appears in phrases like undicesimo secolo (eleventh century) and in rankings or lists, for example undicesimo posto or undicesimo elemento.

Etymology and related forms: undicesimo derives from the cardinal eleven undici, extended with the Latin-derived ordinal suffix -esimo, reflecting a common pattern in Italian for forming ordinals from numerals. The root and suffix combine to denote a precise position within an ordered series. The terminology parallels other Italian ordinals such as primo (first), secondo (second), and decimo (tenth).

Usage notes: as an adjective, undicesimo typically precedes the noun it modifies, and when the noun is omitted, it can function as a standalone ordinal in lists or references. In everyday language, it appears in contexts ranging from building navigation and literature to coursework and historical discussion. The feminine and plural forms are used to maintain agreement with surrounding nouns.

In summary, undicesimo is the standard Italian word for “the eleventh,” with gendered and plural variants to match different nouns and grammatical contexts.