-iedig

• -edig

From Proto-Brythonic *-ẹdig, from Proto-Celtic *-atīkos, probably from a combination of Proto-Indo-European *-eh₂t- + *-kos.

Cognate with Cornish -esik and more distantly Latin -āticus.

• (North Wales) IPA^(key): /ˈjɛdɪɡ/
• (South Wales) IPA^(key): /ˈjeːdɪɡ/, /ˈjɛdɪɡ/
• Rhymes: -jeːdɪɡ

-iedig

1. adjectival suffix forming deverbal adjectives -ed

   ‎cysylltu (“to connect”) + ‎-iedig → ‎cysylltiedig (“connected”)

2. adjectival suffix indicating having characteristics the root

-iedig does not form a past participle, which does not exist in Welsh. Words formed with -iedig are much rarer than past participles are in English and are solely adjectival.

In some cases, a variant with the suffix -edig exists: trefniedig/trefnedig, taliedig/taledig, cysylltiedig/cysylltedig.

R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke et al., editors (1950–present), “-iedig”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies