If someone is rash or does rash things, they act without thinking carefully first, and therefore make mistakes or behave foolishly.
It would be rash to rely on such evidence.
依靠这样的证据太轻率了。
rashes
A rash is an area of red spots that appears on your skin when you are ill or have a bad reaction to something that you have eaten or touched.
He may break out in a rash when he eats these nuts.
他吃了这些坚果以后可能会长出疹子。
If you talk about a rash of events or things, you mean a large number of unpleasant events or undesirable things, which have happened or appeared within a short period of time.
spate
one of the few major airlines left untouched by the industry's rash of takeovers.
在这一连串的行业兼并中少数几个未被波及的大航空公司之一。