pedwar ar bymtheg a phedwar ugain

From pedwar (“four”) +‎ ar (“on”) +‎ pymtheg (“fifteen”) +‎ a (“and”) +‎ pedwar (“four”) +‎ ugain (“twenty”).

• (North Wales) IPA^(key): /ˌpɛdwar ar ˌbəmθɛɡ a ˌfɛdwar ˈɪɡai̯n/
• (South Wales, standard, colloquial) IPA^(key): /ˌpɛdwar ar ˌbəmθɛɡ a ˌfɛdwar ˈiːɡai̯n/, /ˌpɛdwar ar ˌbəmθɛɡ a ˌfɛdwar ˈɪɡai̯n/
  • (South Wales, colloquial) IPA^(key): /ˌpɛdwar ar ˌbəmθɛɡ a ˌfɛdwar ˈiːɡɛn/, /ˌpɛdwar ar ˌbəmθɛɡ a ˌfɛdwar ˈɪɡɛn/

pedwar ar bymtheg a phedwar ugain m (feminine form pedair ar bymtheg a phedwar ugain)

1. ninety-nine

   Synonyms: cant namyn un, naw deg naw

The decimal pedair ar bymtheg a phedwar ugain can only be used with masculine nouns whereas the synonymous decimal naw deg naw can be used with nouns of any gender.