flu-like

The term "flu-like" is a modern English compound adjective formed by combining a clipped colloquialism with a native suffix. The first element, "flu," is a 19th-century shortening of "influenza," an Italian word borrowed into English. "Influenza" itself originates from the Medieval Latin influentia, reflecting an archaic belief that epidemics were caused by the "influence" of the stars. The second element, "-like," is a productive suffix descended from the Old English noun līc ("body, form"), which evolved to denote resemblance. Thus, the compound's logic is transparent: it literally means "having the form or characteristics of influenza," used to describe symptoms that mimic those of the flu virus.

Structure: flu (influenza) + like (resembling) - flu: A clipping of the word "influenza", ultimately from Italian (influenza), from Medieval Latin (influentia), meaning "influence" or "flowing in". In this compound, it functions as the base noun denoting the specific illness. - like: From Old English (līc), meaning "body, form, likeness". In this compound, it functions as an adjective-forming suffix meaning "having the characteristics of" or "similar to".