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v. Simple past tense and past participle of blench.

"Gabriel now, as his eye rested full upon that threatening brow and those burning eyes, was convinced that he saw before him the terrible Pierre Guillot, whose very name blenched his father's cheek."

blenched    blenches    blenching   

colour    color    discolour    discolor   

unblenching   

blenched    blenching   

shrink    flinch    quail    baffle    disconcert   

counterrecoil    rob    disease    break    obed