途方に

at a loss

→ 途方
phrase Uncommon #8,867
at a loss Usually appears in the expression 途方に暮れる, meaning to be at a loss or not know what to do.
JA: 道に迷って、どうすればいいか途方に暮れた。
EN: I got lost and was at a loss about what to do.

君の忠告がなければ、私は途方にくれるだろう。

Without your advice, I would be at a loss.

ベンは次になんと言っていいか途方にくれた。

Ben was at a loss for what to say next.

次に何をすればよいか彼は途方にくれた。

He was at a loss as to what to do next.