- displaying or proceeding from a lack of careful consideration of the possible consequences of an action鲁莽的, 轻率莽撞的; 急躁的：
it would be extremely rash to make such an assumption
做出这样的假定是极为轻率的
a rash decision.
轻率的决定。
派生词
rashly
adverbrashness
noun词源
late Middle English （also in Scots and northern English in the sense 'nimble, eager'）： of Germanic origin; related to German rasch.
1
- an area of reddening of a person's skin, sometimes with raised spots, appearing especially as a result of illness疹, 疹子。
1.1
- a series of things of the same type, especially when unpleasant or undesirable, occurring or appearing one after the other within a short space of time（短时间内的）一连串（尤指始料不及的坏事）：
a rash of strikes by health-service workers.
医疗卫生工作者举行的一连串罢工。
词源
early 18th cent.: probably related to Old French rasche 'eruptive sores, scurf'; compare with Italian raschia 'itch'.