Welsh edit

Welsh numbers (edit)
[a], [b], [c] ←  17 18 19  → [a], [b], [c]
    Cardinal (feminine / vigesimal): tair ar bymtheg, ugain namyn dwy
    Cardinal (vigesimal): deunaw
    Cardinal (decimal): un deg wyth
    Ordinal (masculine / vigesimal): trydydd ar bymtheg
    Ordinal: deunawfed
    Ordinal abbreviation: 18fed

Etymology edit

From dau (two) +‎ naw (nine).

Pronunciation edit

Numeral edit

deunaw

  1. (cardinal number, vigesimal) eighteen
    Synonym: un deg wyth

Mutation edit

Welsh mutation
radical soft nasal aspirate
deunaw ddeunaw neunaw unchanged
Note: Some of these forms may be hypothetical. Not every possible mutated form of every word actually occurs.