un deg saith

Welsh

Welsh numbers ^(edit)

[a], [b] ←  16	17	18  → [a], [b], [c], [d]
Cardinal (masculine / vigesimal): dau ar bymtheg     Cardinal (feminine / vigesimal): dwy ar bymtheg     Cardinal (decimal): un deg saith     Ordinal (masculine / vigesimal): ddeufed ar bymtheg, deufed ar bymtheg     Ordinal (feminine / vigesimal): ddwyfed ar bymtheg, dwyfed ar bymtheg     Ordinal: ail ar bymtheg, eilfed ar bymtheg     Ordinal abbreviation: 17eg
Welsh Wikipedia article on 17

Etymology

From un (“one”) +‎ deg (“ten”) +‎ saith (“seven”).

Pronunciation

• (North Wales) IPA^(key): /ˌɨ̞ndɛɡ ˈsai̯θ/
• (South Wales) IPA^(key): /ˌɪndɛɡ ˈsai̯θ/

Numeral

un deg saith

1. (cardinal number, decimal) seventeen

   Synonyms: dau ar bymtheg, dwy ar bymtheg

Usage notes

The decimal un deg saith can be used with nouns of any gender whereas the vigesimal dau ar bymtheg and dwy ar bymtheg are used solely with masculine and feminine nouns respectively.

Mutation

Welsh mutation
radical	soft	nasal	h-prothesis
un deg saith	unchanged	unchanged	hun deg saith
Note: Some of these forms may be hypothetical. Not every possible mutated form of every word actually occurs.