Unavoidably; necessarily; reluctantly — indicating that something is done because circumstances make it unavoidable.
交通事故でやむを得ず会議を欠席した。
I had to miss the meeting because of a traffic accident.
やむを得ず計画を変更することになった。
We were forced to change the plan out of necessity.
彼はやむを得ず謝罪したが、本当は納得していなかった。
He apologized reluctantly; in truth he wasn't convinced.