Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Welsh -hau
← Proto-Brythonic *-haɣjed (inherited)
← Proto-Celtic *-sagyetor (inherited)
← Irish -igh (cognate)
← Scottish Gaelic -ich (cognate)
← Proto-Indo-European *seh₂g- (root)
← Old Irish -igidir (cognate)

→ Welsh lleihau (affix)
→ Welsh casáu (affix)
→ Welsh mwynhau (affix)
→ Welsh cadarnhau (affix)
→ Welsh rhyddhau (affix)
→ Welsh sicrhau (affix)
→ Welsh cryfhau (affix)
→ Welsh llesgáu (affix)
→ Welsh glanhau (affix)
→ Welsh caniatáu (suffix)
→ Welsh ysgafnhau (affix)
→ Welsh trymhau (affix)
→ Welsh cyfiawnhau (affix)
→ Welsh agosáu (affix)
→ Welsh cwblhau (suffix)
→ Welsh garwhau (affix)
→ Welsh esmwytháu (affix)
→ Irish -igh (cognate)
→ Scottish Gaelic -ich (cognate)
→ Manx -ee (cognate)
→ Old Irish -igidir (cognate)