Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Welsh -iaid
← Welsh -iad (link)

→ Welsh -aid (link)
→ Welsh gwdihŵiaid (affix)
→ Welsh adlawiaid (suffix)
→ Welsh Brythoniaid (affix)
→ Welsh -aduriaid (compound)
→ Welsh trueiniaid (affix)