Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Ancient Greek τρέχω
Proto-Indo-European *dʰregʰ- (root)
Proto-Indo-European *dʰregʰ- (derived)

English trochilus (mention)
Welsh dryw (mention)
Danish drage (cognate)
Greek τρέχω (inherited)
Ancient Greek δρόμος (mention)
Ancient Greek τροχός (mention)
Ancient Greek περιτρέχω (affix)
Ancient Greek δρομάς (mention)
Ancient Greek τρόχις (mention)
Ancient Greek τέρχνος (mention)
Ancient Greek τροχίλος (affix)
Latin trama (mention)
Latin tergus (cognate)
Latin tragula (mention)
Latin trochilus (mention)
Latin tragum (mention)
Old Irish droch (cognate)