-ydd

See also: ydd and YDD

Welsh

Pronunciation

• (North Wales) IPA^(key): /ɨ̞ð/
• (South Wales) IPA^(key): /ɪð/

Etymology 1

From Proto-Brythonic *-ɨð.

Suffix

-ydd

1. pluralization suffix

   Synonyms: -aid, -aint, -au, -ed, -edd, -en, -i, -iadau, -iaid, -iau, -ion, -od, -oedd, -on, -yr, -ys

   ‎cyfarfod (“meeting”) + ‎-ydd → ‎cyfarfodydd (“meetings”)

   ‎afon (“river”) + ‎-ydd → ‎afonydd (“rivers”)

   ‎gwaun (“moor, heath”) + ‎-ydd → ‎gweunydd (“moors, heaths”)

Etymology 2

From Proto-Brythonic *-ɨð, from Proto-Celtic *‑iyū.^[1] Cognate with Cornish -ydh.

Suffix

-ydd m (plural -wyr or -yddion)

1. suffix indicating a person, especially an agent noun: -er, -or, -ist

   Synonyms: -edydd, -iedydd, -wr

   ‎cig (“meat”) + ‎-ydd → ‎cigydd (“butcher”)

   ‎adar (“birds”) + ‎-ydd → ‎adarydd (“ornithologist”)

   ‎llywio (“to steer”) + ‎-ydd → ‎llywydd (“president”)

2. suffix indicating an instrument, machine or substance, especially an agent noun: -er, -or

   Synonyms: -adur, -edydd, -iadur, -iedydd, -iwr, -wr

   ‎hydoddi (“to dissolve”) + ‎-ydd → ‎hydoddydd (“solvent”)

   ‎adweithio (“to react”) + ‎-ydd → ‎adweithydd (“reactor”)

   ‎taflunio (“to project”) + ‎-ydd → ‎taflunydd (“projector”)

Etymology 3

Suffix

-ydd

1. suffix indicating a noun or adjective

   ‎llafar (“spoken, oral”) + ‎-ydd → ‎lleferydd (“speech”)

   ‎llawn (“full”) + ‎-ydd → ‎llonydd (“still, quiet”)

Derived terms

Welsh terms suffixed with -ydd

References

1. Morris Jones, John (1913) A Welsh Grammar, Historical and Comparative, Oxford: Clarendon Press, § 143 iv (9)