humourous

The word "humourous" traces its lineage to the ancient physiological concept of humours. In Latin, 'humor' meant a bodily fluid, and medieval medicine held that an individual's temperament was governed by the balance of four humours. By the late 16th century, the term "humour" evolved to denote a capricious state of mind and, subsequently, the quality of being amusing, as eccentricity was seen as comical. The adjective-forming suffix "-ous," meaning "characterized by," was appended, creating a word that literally means "characterized by humour," solidifying its modern sense of being funny or comical.

Structure: humour (fluid, mood) + ous (adjective suffix) humour: From Latin 'humor' (moisture, fluid), via Old French. In this word, it functions as the core noun root meaning "a quality that is amusing". ous: A suffix of Latin origin via Old French, used to form adjectives meaning "full of" or "having the qualities of".