Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Proto-Indo-European *h₂ey-

→ English young (root)
→ English age (root)
→ English longevity (root)
→ English eternal (root)
→ English either (root)
→ English medieval (root)
→ English eternity (root)
→ English primeval (root)
→ English eon (root)
→ English coeval (root)
→ English eche (root)
→ English juvenile (mention)
→ English youngling (root)
→ English puer aeternus (root)
→ English puella aeterna (root)
→ Catalan juvenil (root)
→ Catalan edat (mention)
→ Welsh oes (derived)
→ Spanish juvenil (root)
→ Spanish edad (mention)
→ French âge (mention)
→ Proto-Germanic e (root(gem-pro/sv))
→ Proto-Germanic æ (root(gem-pro/non))
→ Proto-Germanic e- (root(gem-pro/sv))
→ Galician idade (mention)
→ Ancient Greek αἰών (root)
→ Ancient Greek ἀεί (root)
→ Ancient Greek ἀεί (derived)
→ Ancient Greek ὑγιής (root)
→ Ancient Greek αἴτιος (mention)
→ Ancient Greek οὐ (root)
→ Ancient Greek αἶνος (derived)
→ Ancient Greek αἰειγενέτης (root)
→ Hindi जुवान (root)
→ Prakrit 𑀚𑀼𑀯𑀸𑀡 (root)
→ Italian età (root)
→ Italian età (mention)
→ Italian giovane (root)
→ Italian giovinezza (root)
→ Italian gioventù (root)
→ Italian evo (root)
→ Italian evo (mention)
→ Italian giovanotto (root)
→ Italian giovanotta (root)
→ Italian giovanile (root)
→ Italian giovenca (root)
→ Italian giovenco (root)
→ Italian giovenco (mention)
→ Italian giovincello (root)
→ Italian giovincella (root)
→ Italian giovanesco (root)
→ Italian giovaneggiare (root)
→ Italian giovinaccio (root)
→ Italian giovinaccia (root)
→ Italian giovanaglia (root)