[I]t is sufficient for common use to observe, that perspiration is that insensible discharge of vapour from the whole surface of the body and the lungs which is constantly going on in a healthy state; that it is always natural and always salutary; that sweat, on the contrary, is an evacuation, which never appears without some uncommon effort, or some disease to the system, that it weakens and relaxes, and is so far from coinciding with perspiration, that it obstructs and checks it. [Charles White, "A Treatise on the Management of Pregnant and Lying-in Women," London, 1791]Related: Perspired; perspiring.
词根词缀： per-贯穿,通过 + -spir-呼吸 + -e
该词的英语词源请访问趣词词源英文版：perspire 词源，perspire 含义。
per-,穿过，透过，-spir,呼吸，词源同spirit,transpire.委婉语，引申词义出汗，流汗。