| [a], [b], [c], [d] ← 26 | 27 | 28 → [a], [b] |
|---|---|---|
| Cardinal (decimal): dau ddeg saith Cardinal (vigesimal): saith ar hugain Ordinal: seithfed ar hugain Ordinal abbreviation: 27ain | ||
From dau (“two”) + deg (“ten”) + saith (“seven”).
| Welsh mutation | |||
|---|---|---|---|
| radical | soft | nasal | aspirate |
| dau ddeg saith | ddau ddeg saith | nau ddeg saith | unchanged |
| Note: Some of these forms may be hypothetical. Not every possible mutated form of every word actually occurs. | |||