返へん答とうに困こまる

expression, godan verb (-ru)

be at a loss for an answer; not know how to respond

Used when someone is so surprised, embarrassed, or confused by a question or remark that they cannot think of a suitable reply.

• 突とつ然ぜんの質しつ問もんに、返へん答とうに困こまってしまった。

  I was at a loss for an answer to the sudden question.

• 彼かれの失しつ礼れいな発はつ言げんには