exfoliate (v.) Look up exfoliate at Dictionary.com
1610s, transitive; 1670s intransitive; from Late Latin exfoliatus, past participle of exfoliare "to strip of leaves," from ex "off, out of" (see ex-) + folium "leaf" (from PIE root *bhel- (3) "to thrive, bloom"). Related: Exfoliated; exfoliating.