hot-button

The term "hot-button" is a modern American English compound, originating in the mid-20th century. It combines "hot," an Old English word for high temperature, which evolved to figuratively mean "exciting, intense, or currently popular," with "button," a word for a small control device. The logic of the compound draws from the metaphor of a button that, when pressed, triggers an immediate and intense reaction. Thus, a "hot-button issue" is one that is figuratively "live" or charged, capable of instantly provoking strong public emotion or debate, much like an electrical button activating a powerful circuit.

Structure: hot (intense) + button (trigger) - hot: From Old English hāt ("hot, fervent, intense"). In this compound, it functions as an intensifier meaning "exciting, lively, or currently popular and contentious." - button: From Old French boton ("a bud, knob"), ultimately of Germanic origin. In this compound, it metaphorically means "a trigger or control mechanism," as in "pressing a button" to activate something.