ichidan verb, intransitive verb
be amazed; be dumbfounded; be exasperated; be fed up
Expresses being so surprised, shocked, or disappointed by something unreasonable or excessive that one feels dumbfounded, disgusted, or exasperated. Common patterns include ~に呆れる and 呆れてものが言えない.
彼の言い訳には呆れた。
I was exasperated by his excuse.
I was so dumbfounded by the sheer irresponsibility that I could not say anything.