Word Story
At its most concrete, the word describes the steady, unglamorous job of keeping a fire, furnace or engine alive — the work of a fireman on a steam locomotive, shoveling coal mile after mile to hold the pressure steady. From there it moves easily into metaphor: an argument, a rivalry or a public panic can be fed with fresh material until it burns hotter, and the feeding is usually deliberate. That figurative use carries a whiff of disapproval, since the person doing it is rarely trying to calm things down. In everyday writing it turns up most often in news copy and opinion pieces, where one remark or policy is said to add to tensions that were already simmering. The related adjective, describing someone as thrilled or excited, belongs to relaxed conversation and reads quite differently from the verb — a reminder that one small ending can change the temperature entirely.