tri ar ddeg

Welsh

**Welsh numbers ^(edit)**
^{, ,} ← 12	13	14 → ^{, , ,}
Cardinal (masculine / vigesimal): tri ar ddeg Cardinal (masculine / decimal): un deg tri Cardinal (feminine / decimal): un deg tair Cardinal (feminine / vigesimal): tair ar ddeg Ordinal (masculine): trydydd ar ddeg Ordinal (feminine): trydedd ar ddeg Ordinal (vigesimal): (non-standard) triarddegfed Ordinal abbreviation: 13eg
Welsh Wikipedia article on 13

From tri (“three”) +‎ ar (“on”) +‎ deg (“ten”).

tri ar ddeg m (feminine tair ar ddeg)

(cardinal number, vigesimal) thirteen
Synonym: un deg tri
- 1588-1620, “1 Brenhinoedd 7:1”, in William Morgan, transl., edited by William Parry and John Davies, Mallwyd, Y Bibl Cyssegr-Lan, sef yr Hen Destament a’r Newydd‎; republished London, 1804:
  Eithr ei dŷ ei hun a adeiladodd Solomon mewn tair blynedd ar ddeg, ac a orffennodd ei holl dŷ.
  Solomon was building his own house thirteen years, and he finished all his house.

Mutated forms of *tri ar ddeg*
radical	soft	nasal	aspirate
tri ar ddeg	dri ar ddeg	nhri ar ddeg	thri ar ddeg

Note: Certain mutated forms of some words can never occur in standard Welsh.
All possible mutated forms are displayed for convenience.