呆あきれ返かえる

godan verb (-ru), intransitive verb

be utterly amazed; be stunned; be disgusted

Expresses a strong reaction of astonishment or disgust, often at something so extreme it leaves one speechless. The 返る suffix intensifies the feeling.

• 彼かれの無む責せき任にんな態たい度どには呆あきれ返かえった。

  I was utterly amazed at his irresponsible attitude.