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 *h₂ekʷeh₂

→ English island (derived)
→ English ea (inherited)
→ English eau (inherited)
→ English ey (derived)
→ English yeo (inherited)
→ English Eau (derived)
→ Old English ea (inherited)
→ Old English ieg (derived)
→ Asturian agua (inherited)
→ Catalan aigua (inherited)
→ Cebuano agwas (derived)
→ Corsican acqua (inherited)
→ Danish å (inherited)
→ Danish ø (derived)
→ Danish Århus (derived)
→ Emilian âcua (inherited)
→ Emilian àqua (inherited)
→ Spanish agua (inherited)
→ Faroese á (derived)
→ French eau (inherited)
→ Old French ewe (inherited)
→ Galician auga (derived)
→ Icelandic á (inherited)
→ Italian acqua (inherited)
→ Italian àcua (inherited(it/vec))
→ Ladino agua (inherited)
→ Lombard acqua (inherited)
→ Mirandese auga (derived)
→ Neapolitan acqua (inherited)
→ Dutch Aa (derived)
→ Old Norse á (inherited)
→ Old Norse ǫ́ (inherited)
→ Norman yo (inherited)
→ Norman ieau (inherited)
→ Norman iaoue (inherited)
→ Norman iâo (inherited)
→ Old Spanish agua (inherited)
→ Old Saxon aha (inherited)
→ Papiamentu awa (derived)
→ Picard iau (inherited)
→ Portuguese água (inherited)
→ Romansch ova (inherited)
→ Romansch ava (inherited)
→ Romansch aua (inherited)
→ Romanian apă (inherited)
→ Gallo èv (derived)