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English flail
← Old English fligel (inherited)
← Old English *flegel (mention)
← German Flegel (cognate)
← Middle English flaile (inherited)
← Middle English flayle (mention)
← Middle English fleil (mention)
← Middle English fleyl (mention)
← Middle English fleȝȝl (mention)
← Old French fil (derived)
← Old French flael (cognate)
← West Frisian fleil (cognate)
← West Frisian flaaiel (mention)
← Proto-Germanic *flagilaz (inherited)
← Proto-Germanic *flag- (derived)
← Proto-Germanic *flah- (mention)
← Proto-Germanic *-ilaz (derived)
← Ancient Greek πληγνύναι (cognate)
← Proto-Indo-European *pleh₂k- (derived)
← Proto-Indo-European *bʰlag- (derived)
← Proto-Indo-European *bʰlaǵ- (mention)
← Italian flagello (cognate)
← Latin fīlum (derived)
← Latin plangō (cognate)
← Latin flagellum (derived)
← Latin flagrum (mention)
← Lithuanian plàkti (cognate)
← Low German vlegel (cognate)
← Dutch vlegel (cognate)
← Old Norse blekkja (cognate)
← Scots flail (cognate)
← Walloon flayea (cognate)

→ English flog (link)
→ English flaily (suffix)
→ English flail tank (compound)
→ English flailsome (suffix)
→ Czech biják (link)
→ Faroese treskja (link)