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 *swé

→ English so (derived)
→ English sole (derived)
→ English swain (derived)
→ English custom (mention)
→ English costume (mention)
→ English Sabellian (mention)
→ English sere (derived)
→ English sere (derived(en/enm))
→ English consuetude (mention)
→ English idioticon (derived)
→ English kastom (mention)
→ English swadeshi (derived)
→ English hetegony (derived)
→ Avestan 𐬓𐬀 (inherited)
→ Old English swa (inherited)
→ Old English sweotol (derived)
→ Catalan seu (mention)
→ Corsican so (inherited)
→ Czech svůj (derived)
→ German sein (derived)
→ Spanish sí (mention)
→ Spanish su (mention)
→ Spanish serna (derived)
→ Persian خود (inherited)
→ Persian خو (inherited)
→ Persian خویش (inherited)
→ Faroese sveinur (derived)
→ French son (mention)
→ French costume (mention)
→ French soi (inherited)
→ French coutume (mention)
→ Middle French coustume (mention)
→ Old French costume (mention)
→ Old French consuetude (mention)
→ Old French coustume (mention)
→ Old French custume (mention)
→ Irish féin (derived)
→ Galician costume (mention)
→ Galician senra (derived)
→ Galician Suevos (derived)
→ Galician Suegos (derived)
→ Westrobothnian sä (derived)
→ Ancient Greek ἔθνος (derived)
→ Ancient Greek ἔθω (mention)
→ Ancient Greek ὅς (inherited)
→ Ancient Greek ἑός (mention)
→ Ancient Greek οὗ (inherited)
→ Ancient Greek ἑταῖρος (inherited)
→ Ancient Greek σφώ (derived)
→ Ancient Greek ἑκάς (derived)
→ Ancient Greek ἕ (inherited)
→ Ancient Greek ἧλιξ (inherited)
→ Ancient Greek ἔτης (mention)