flinch flinch /ˈflɪntʃ/

noun

1. A reflex response to sudden pain  ( flinch , wince )
   a reflex response to sudden pain
   

verb

1. () Draw back, as with fear or pain  ( funk , squinch [ N. American] , quail , cringe , flinch , recoil , shrink , wince )
   draw back, as with fear or pain
    She flinched when they showed the slaughtering of the calf
   she flinched when they showed the slaughtering of the calf