Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Proto-Indo-European *h₂érh₃trom

→ Belarusian рала (derived)
→ Bulgarian рало (inherited)
→ Breton arar (inherited)
→ Catalan arada (inherited)
→ Old Church Slavonic рало (inherited)
→ Welsh aradr (inherited)
→ Lower Sorbian radło (inherited)
→ Greek άροτρο (derived)
→ Spanish arado (inherited)
→ Finnish aura (derived)
→ Irish arathar (inherited)
→ Galician arado (derived)
→ Westrobothnian ahl (inherited)
→ Ancient Greek ἄροτρον (inherited)
→ Upper Sorbian radło (inherited)
→ Italian aratro (inherited)
→ Latin aratrum (derived)
→ Lithuanian arklas (inherited)
→ Latvian arkls (mention)
→ Macedonian рало (inherited)
→ Old Norse arðr (inherited)
→ Livvi adru (derived)
→ Old East Slavic рало (inherited)
→ Polish radło (inherited)
→ Portuguese arado (inherited)
→ Romanian arat (inherited)
→ Russian рало (inherited)
→ Serbo-Croatian рало (inherited)
→ Slovak radlo (derived)
→ Swedish årder (inherited)
→ Ukrainian рало (inherited)
→ Old Armenian արօր (inherited)
→ Slovincian rädło (inherited)