-wch

• IPA^(key): /ʊχ/

-wch

1. forming abstract nouns, -ness, -ment

   ‎teg (“fair”) + ‎-wch → ‎tegwch (“fairness”)

   ‎tawel (“quiet”) + ‎-wch → ‎tawelwch (“quietness, silence”)

   ‎hyfryd (“lovely”) + ‎-wch → ‎hyfrydwch (“loveliness”)

-wch

1. (literary) verb suffix for the second-person plural present indicative/future
2. (literary) verb suffix for the second-person plural imperative
3. (colloquial) verb suffix for the second-person plural future
4. (colloquial) verb suffix for the second-person plural imperative

In the literary language, -wch causes i-affection of internal vowels, for example, ‎canu (“to sing”) + ‎-wch → ‎cenwch (“you will sing; sing”).