to shrink back; to wince; to flinch; to recoil
彼女は敵の威嚇にもたじろがなかった。
She didn't flinch even under the enemy's intimidation.
群衆の勢いにたじろいだが、何とか踏みとどまった。
I recoiled at the force of the crowd but managed to hold my ground.
たじろいでいる場合ではない、今すぐ動くべきだ。
This is no time to flinch — we need to act right now.