hair-triggerWiktionary 原文构词拆分hair词根/词干+trigger词根/词干词源说明From hair + trigger.释义（英文）名词 NounA trigger that will set off a firearm when even a very small pressure is applied.形容词 AdjectiveUnstable; in a situation that could be worsened by the slightest mistake.Easily angered; having a short temper.