*Torpid* describes someone or something that is barely moving, slow, dull, and without energy — not because they are resting on purpose, but because the life seems to have gone out of them for a while. A person can feel torpid after a huge lunch on a hot afternoon: awake, but heavy, unwilling, thinking slowly. The word does real work in science, and this is worth knowing because it is the clearest picture of it. Animals become torpid in cold weather: a bat or a small bird drops its body heat, its heart slows right down, and it sits almost still to save energy. That is *torpor* as a real bodily state, close to a light kind of hibernation. Everything human about the word grows out of that image — a body running at half power. Outside science it is a formal, bookish word. You would meet it in writing, not usually in conversation. In daily speech people say *sluggish*, *drowsy*, *half asleep*, or just *I can't get going today*. If a student writes "I felt torpid this morning" it is not wrong, but it sounds like an English novel from a hundred years ago, and a native speaker might smile. It also stretches beyond people and animals. Writers use it for anything that should be moving but is not: a torpid economy, a torpid summer town, a torpid afternoon where nothing happens. There is often a faint tone of criticism in it — that things ought to be livelier than this. The learner's dictionary line says "lazy or sleepy", and that is a fair short answer, though I would soften the *lazy* part. Lazy suggests the person chose it. Torpid usually suggests something acting on them — the heat, the food, the long winter, the boredom.

遲鈍的、懶洋洋提不起勁的；（動物）進入蟄伏狀態的。書面用語，日常口語多半講 sluggish 或 drowsy。