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-Iranian *Háykas

→ Assamese এক (inherited)
→ Assamese এ- (derived)
→ Assamese আক (inherited)
→ Bhojpuri एगो (inherited)
→ Bengali এক (inherited)
→ Dhivehi އެކެއް (derived)
→ Garhwali यक (inherited)
→ Gujarati એક (inherited)
→ Hindi एक (inherited)
→ Sauraseni Apabhramsa एक्क (inherited)
→ Kalasha ek (inherited)
→ Konkani एक (inherited)
→ Maithili एक (inherited)
→ Marathi एक (inherited)
→ Nepali एक (inherited)
→ Oriya ଏକ (derived)
→ Punjabi ਇੱਕ (inherited)
→ Punjabi اک (inherited)
→ Pangwali यक (inherited)
→ Sauraseni Prakrit 𑀏𑀓𑁆𑀓 (inherited)
→ Kalo Finnish Romani iek (inherited)
→ Welsh Romani jekh (inherited)
→ Romani jekh (inherited)
→ Sanskrit एक (inherited)
→ Sinhalese එක (inherited)
→ Sylheti ꠄꠇ (inherited)
→ Urdu ایک (inherited)