speechless
US /ˈspiːtʃ.ləs/
UK /ˈspiːtʃ.ləs/

1.
말문이 막힌, 말 못하는
unable to speak, especially as a result of shock or strong emotion
:
•
She was left completely speechless by the unexpected proposal.
그녀는 예상치 못한 제안에 완전히 말문이 막혔다.
•
He was speechless with rage.
그는 분노로 말문이 막혔다.