wince

Concise Oxford English Dictionary © 2008 Oxford University Press:
wince1

▶verb give a slight involuntary grimace or flinch due to pain or distress. ▶noun an instance of wincing.

– derivatives
wincer noun,
wincing adjective,
wincingly adverb.

– origin ME: from an Anglo-Norman Fr. var. of OFr. guenchir ‘turn aside’.

Concise Oxford English Dictionary © 2008 Oxford University Press:
wince2

▶noun Brit. a roller for moving textile fabric through a dyeing vat.

– origin C17: var. of winch.