seethe

To seethe means to be filled with intense, often unspoken emotion, most often anger, but also resentment, frustration, or sometimes suppressed excitement. The word comes from an old word meaning "to boil," and that image still matters: seething suggests energy turning and pressing just below the surface, not yet released but ready to spill out.

Unlike a quick flash of temper, seethe usually points to a deeper feeling that lasts for a while. Someone may be annoyed by a small problem, but they might seethe over a serious insult or injustice. In stories, the word often describes a person trying hard to stay in control: they may say nothing, but anger is clearly building inside them.

Beyond human emotion, seethe can also describe physical movement. A place, crowd, or even the sea can seethe when it is full of restless, swirling motion, like water at a boil. A market might seethe with activity, or the ocean might seethe after a violent storm. Whether it describes hidden anger or a mass of moving activity, the word always carries a sense of pressure, motion, and energy that is hard to contain.