返答 へんとう きゅうする
hentōni kyūsuru

Suru Verb
Expression

1. to be embarrassed for a reply; to be at a loss for a reply

Related to 返答に詰まる
わたくし返答 へんとう きゅうした。
watashiwa hentōni kyū shita
I was at a loss for an answer.