trigeiniau

== Welsh == === Etymology === trigain (“three score”, “sixty”) +‎ -iau === Pronunciation === (North Wales, standard) IPA(key): /trɪˈɡei̯njaɨ̯/ (North Wales, colloquial) IPA(key): /trɪˈɡei̯njɛ/, /trɪˈɡei̯nja/ (South Wales, standard) IPA(key): /trɪˈɡei̯njai̯/ (South Wales, colloquial) IPA(key): /trɪˈɡei̯njɛ/ === Noun === trigeiniau pl (plural only) sixties (decade) === Mutation ===