English
fansplain
From fan + -splain.
Formed from fan + -splain
Proto-Indo-European *h₂weh₁- ‘to blow’
Latin vannus ‘fan for winnowing grain’
Old English fann ‘a winnowing fan’
Middle English fan
English fan
Today it means
verb To explain something as a fan or in a fannish manner.
Language periods are conventional ranges, not dates for this word.
Etymograph / fansplain