Where does “unflapping” come from?

unflapping (English) comes from English flapping, from English flap, from Middle English flap.

unflapping (English): Not flapping

Definitions

  1. Not flapping

Ancestry of “unflapping”, step by step

unflapping traces back through two separate lines of ancestry.

via English flapping

StepLanguageWordMeaning
1Englishflappingthat flaps or flap; An instance where one flaps;...
2EnglishflapAnything broad and flexible that hangs loose, or...
3Middle Englishflap

via English un

StepLanguageWordMeaning
1EnglishunOne
Every word from Middle English flap