Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Welsh -iau
Breton -ioù (cognate)
Cornish -yow (cognate)

Breton -ioù (cognate)
Welsh nosweithiau (affix)
Welsh dyddiau (affix)
Welsh faniau (affix)
Welsh breichiau (affix)
Welsh ffeithiau (affix)
Welsh pleidiau (affix)
Welsh blodiau (affix)
Welsh prifeiriau (affix)
Welsh clustiau (affix)
Welsh ffrindiau (affix)
Welsh dreigiau (affix)
Welsh ffilmiau (affix)
Welsh gweithiau (affix)
Welsh clybiau (affix)
Welsh cyrsiau (affix)
Welsh cyfrineiriau (affix)
Welsh bariau coffi (affix)
Welsh bariau (affix)
Welsh cadeiriau (affix)
Welsh damweiniau (affix)
Welsh waliau (affix)
Welsh cotiau (affix)
Welsh cotiau (affix)
Welsh bryniau (affix)
Welsh ffensiau (affix)
Welsh -eidiau (compound)
Welsh sgwariau (affix)
Welsh hwyliau (affix)
Welsh aeliau (affix)
Welsh anghytgordiau (affix)
Cornish -yow (cognate)