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English truant
Breton truan (derived)
Breton truc (cognate)
Gaulish *trugan (derived)
Proto-Celtic *térh₁-tro-m (derived)
Welsh tru (cognate)
Middle Dutch trouwant (cognate)
Middle Dutch trawant (mention)
Middle Dutch truwant (mention)
Middle English truant (inherited)
Middle English truand (mention)
Middle English trewande (mention)
Middle English trowant (mention)
Old French truand (derived)
Old French truant (mention)
Irish trogha (cognate)
Irish trogán (mention)
Scottish Gaelic truaghan (cognate)
Proto-Indo-European *terh₁- (root)
Proto-Indo-European *terh₁- (derived)

English truancy (suffix)
English truantship (suffix)
English truantly (suffix)
English truantry (suffix)
Spanish truhan (cognate)
French truand (cognate)
Dutch lanterfant (cognate)