| [a], [b], [c] ← 12 | 13 | 14 → [a], [b], [c], [d] |
|---|---|---|
| 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”).
| Welsh mutation | |||
|---|---|---|---|
| radical | soft | nasal | h-prothesis |
| un deg tair | unchanged | unchanged | hun deg tair |
| Note: Some of these forms may be hypothetical. Not every possible mutated form of every word actually occurs. | |||