Etymology
From Late Middle English, an alteration of whitflaw, with the first element deriving either from Middle Dutch vijt or Low German fit (“abscess”), borrowed from Latin fīcus (“fig-shaped (ulcer)”), though also influenced by white. The Latin loan also existed in other languages, such as Old English fic (“hemorrhoids”). See flaw.
Definitions & examples from Wiktionary (CC BY-SA 3.0).