trenchant

There’s much to know about the word trenchant, but we’ll cut to the chase. The word trenchant comes from the Anglo-French verb trencher, meaning “to cut.” Hence, a trenchant sword is one with a keen edge. Nowadays, trenchant mostly describes things that don’t cut deep literally, but that are still felt: a trenchant remark is one that cuts close to the bone, and a trenchant observation is one that cuts to the heart of the matter. In addition to meaning “caustic” and “sharply perceptive,” trenchant also carries a sense meaning “very strong, clear, and effective” that may be used, for instance, to describe a persuasive essay written with intellectual rigor. If you find yourself forgetting these “edgy” definitions, you might dig up a familiar relative of trenchant: the noun trench, which refers to a long cut or ditch in the ground.