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Latin follis
Old English belġ (cognate)
Old English belġan (mention)
English belly (mention)
Proto-Indo-European *bʰelǵʰ- (root)
Proto-Indo-European (inherited)
Proto-Indo-European *bʰelǵʰ- (mention)
Proto-Indo-European *-n- (mention)
Proto-Indo-European (inherited)
Proto-Indo-European *bʰel- (mention)
Old Prussian balsinis (mention)
Sanskrit बर्हिस् (cognate)
Old Irish bolg (mention)

English bull (cognate)
English fool (derived)
English foolhardy (derived)
English follis (borrowed)
English fals (derived)
Arabic فلس (derived)
Arabic جريب (link)
Asturian fuelga (derived)
Asturian fuelle (inherited)
Catalan foll (derived)
Catalan follar (derived)
Danish fjols (derived)
Middle English fool (derived)
Middle English fole (derived)
Middle English folehardy (derived)
Spanish follar (derived)
Spanish follar (derived)
Spanish desollar (inherited)
Spanish huelga (derived)
Spanish holgar (inherited)
Spanish hollar (inherited)
Spanish follón (derived)
Spanish hollejo (mention)
Spanish fuelle (inherited)
French fou (inherited)
French flouze (derived)
Old French fol (inherited)
Galician fol (inherited)
Galician folgar (derived)
Galician folello (mention)
Ancient Greek βαλλάντιον (cognate)
Italian folle (mention)
Italian folle (mention)
Italian folle (mention)
Italian affollare (derived)
Latin phallus (mention)
Latin folliculus (mention)
Latin follico (mention)
Latin folleo (mention)
Norman fo (inherited)
Norman folle (derived)
Occitan hòu (inherited)
Old Occitan fol (inherited)
Portuguese fole (inherited)
Portuguese folgar (inherited)