Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Welsh tref
Proto-Brythonic *treβ (inherited)
Proto-Celtic *trebā (inherited)
Proto-Indo-European *treb- (inherited)

English tref (cognate)
English artesian (cognate)
English Pendre (mention)
English Treffgarne (derived)
Welsh trefol (suffix)
Welsh trefi (affix)
Welsh Trefor (mention)
Welsh Trefynwy (affix)
Welsh taeogtref (compound)
Welsh trefydd (affix)
Welsh maestref (compound)
Welsh pentref (compound)
Welsh adref (prefix)
Welsh cartref (compound)
Welsh trefgordd (compound)
Welsh hendref (compound)
Welsh athref (affix)
Welsh cytref (affix)
French Artois (mention)
Irish baintreach (cognate)
Latin Atrebates (mention)
Albanian trevë (cognate)