► <a class='CategoryTreeLabel CategoryTreeLabelNs14 CategoryTreeLabelCategory' href='/wiki/Category:Welsh_words_suffixed_with_-iad'>Welsh words suffixed with -iad</a>
Etymology
From Proto-Brythonic*-ad, from earlier *-atus, a late (British) variant of *-ātus, used to form verbal nouns from Celtic ā-stem verbs. The -i- is secondary.