incan

The term "Incan" originates from the name of the pre-Columbian empire and its ruling class, the Inca. Spanish chroniclers adopted the word Inca from Quechua, the language of the empire, where inka signified "ruler" or "lord." Upon entering English, the name was Anglicized, and the productive suffix "-an" (from Latin -anus, meaning "belonging to") was appended to form the adjective "Incan." This term now broadly describes the culture, people, and artifacts associated with that historical civilization, transitioning from a specific title for a sovereign to a general ethnic and cultural identifier.

The word "Incan" is a proper adjective derived from the name of a specific civilization. It is not productively formed from combinable English morphemes. The base is "Inca," a loanword from Spanish, which itself comes from Quechua inka ("ruler, lord"). The suffix "-an" is an English adjectival suffix meaning "of or pertaining to," attached directly to the proper noun "Inca."