un deg tair

Welsh

**Welsh numbers ^(edit)**
^{, ,} ← 12	13	14 → ^{, , ,}
Cardinal (feminine / decimal): un deg tair Cardinal (masculine / decimal): un deg tri Cardinal (masculine / vigesimal): tri ar ddeg 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 un (“one”) +‎ deg (“ten”) +‎ tair (“three”).

Mutated forms of *un deg tair*
radical	soft	nasal	h-prothesis
un deg tair	unchanged	unchanged	hun deg tair

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