Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Romanian lupta
Proto-Indo-European *lewg- (derived)
Latin luctārī (inherited)
Latin luctor (mention)

Spanish luchar (cognate)
French lutter (cognate)
Portuguese lutar (cognate)
Romanian luptător (suffix)
Romanian luptare (suffix)
Aromanian alumtu (cognate)