Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Welsh ad-
← Proto-Brythonic *ate- (inherited)
← Proto-Celtic *ati- (inherited)
← English ed- (cognate)
← Proto-Indo-European *éti (inherited)
← Cornish as- (cognate)
← Latin et (cognate)
← Sanskrit अति (cognate)

→ English ed- (cognate)
→ Welsh agos (mention)
→ Welsh adwthio (affix)
→ Welsh ateb (prefix)
→ Welsh adflas (affix)
→ Welsh adfer (prefix)
→ Welsh adolygu (affix)
→ Welsh adferf (affix)
→ Welsh atal (affix)
→ Welsh adrodd (affix)
→ Welsh adnodd (affix)
→ Welsh adlyn (affix)
→ Welsh adargraffiad (affix)
→ Welsh adargraffu (affix)
→ Welsh adborth (affix)
→ Welsh ad-dalu (affix)
→ Welsh ad-drefnu (affix)
→ Welsh adlewyrchu (prefix)
→ Welsh adlynu (affix)
→ Welsh adenedigaeth (affix)
→ Welsh adennill (affix)
→ Welsh adfeddiannu (affix)
→ Welsh adfilwr (affix)
→ Welsh adfyd (affix)
→ Welsh adfywio (affix)
→ Welsh adladd (affix)
→ Welsh adlais (affix)
→ Welsh adlef (affix)
→ Welsh adlam (affix)
→ Welsh adlamu (affix)