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 *h₃er-

→ English abort (root)
→ English abortion (root)
→ English run (root)
→ English earl (derived)
→ English rin (root)
→ English orient (root)
→ English orient (derived)
→ English random (root)
→ English random (derived)
→ English earn (root)
→ English earn (derived)
→ English arboreal (root)
→ English earnest (root)
→ English origin (root)
→ English orientate (root)
→ English orientation (root)
→ English yearn (root)
→ English yearn (derived)
→ English yearning (root)
→ English yearning (mention)
→ English arduous (root)
→ English Erinys (root)
→ English Ernest (root)
→ English Orient (root)
→ English origo (root)
→ English Oriental (root)
→ English oro- (root)
→ English rine (root)
→ English Erinyes (root)
→ Bulgarian орляк (cognate)
→ Catalan riu (mention)
→ Czech růst (derived)
→ Czech zřítit (derived)
→ Old Church Slavonic расти (derived)
→ Lower Sorbian rosć (derived)
→ Spanish río (mention)
→ French ru (mention)
→ Proto-Germanic randón (derived(gem-pro/gl))
→ Ancient Greek οὖρος (derived)
→ Ancient Greek Ῥῆνος (mention)
→ Ancient Greek ὄρος (root)
→ Ancient Greek ὄρος (derived)
→ Ancient Greek ὄρνυμι (root)
→ Ancient Greek ὄρνυμι (derived)
→ Ancient Greek ἔρις (derived)
→ Ancient Greek ἔρνος (derived)
→ Ancient Greek ὀρίνω (root)
→ Ancient Greek ὀρίνω (derived)
→ Ancient Greek ὄρμενος (derived)
→ Ancient Greek ἄψορρος (derived)
→ Hittite 𒀀𒊒𒈾𒀸 (inherited)
→ Hittite 𒅈𒉡𒊻𒍣 (inherited)
→ Italian rio (mention)
→ Latin arista (derived)
→ Latin orior (derived)
→ Norwegian Bokmål abort (root)
→ Norwegian Bokmål abort (derived)
→ Norwegian Bokmål ruse (root)
→ Norwegian Bokmål ruse (derived)
→ Norwegian Bokmål rival (mention)
→ Norwegian Bokmål abortiv (root)
→ Norwegian Bokmål abortiv (derived)
→ Norwegian Bokmål aboriginer (root)
→ Norwegian Bokmål aboriginer (derived)
→ Norwegian Bokmål abortere (root)
→ Norwegian Bokmål abortere (derived)
→ Norwegian Bokmål aborigin (root)
→ Norwegian Bokmål aborigin (derived)
→ Norwegian Bokmål abortus provocatus (root)