expression, i-adjective
speechless; dumbfounded; tongue-tied
Describes being so shocked, amazed, or overwhelmed that one cannot speak. Often used in the form 物が言えないほど or 物が言えなくなる.
あまりの美しさに物が言えなかった。
I was speechless at the sheer beauty.
突然の知らせに、
He seemed tongue-tied at the sudden news.