without flinching
Without showing any signs of fear or hesitation. I'm terrified of needles, but my sister can get blood drawn without flinching.
flinch from (someone or something)
To recoil from someone or something, often in fear. Teddy flinched from the nurse as she approached him with the needle. We all flinched from the barking dog.
flinch from someone or something
to move back suddenly from someone or something; to shrink (back) (from someone or something) suddenly. She struck at him and he flinched from her. At the last minute the center fielder flinched from the ball.