English Etymology Etymology treeProto-Indo-European *gels-der.Proto-Indo-European *golsosProto-Germanic *kalzazder.Proto-Germanic *kalzōnąProto-West Germanic *kalʀōnOld English cealliander.Old English *callianMiddle English callenEnglish callProto-Indo-European *-tḗrProto-Indo-European *-dʰlomder.Proto-Indo-European *-dʰlisProto-Italic *-ðlisLatin -bilisLatin -ābilisProto-Indo-European *-teh₂Proto-Indo-European *-tsProto-Indo-European *-teh₂tsProto-Italic *-tātsLatin -tāsLatin -abilitasMiddle French -abletébor.Middle English -ableteEnglish -abilityEnglish callabilityFrom call + -ability. Noun callability (uncountable) The state or condition of being callable.