-igh

• -aigh (broad version)

From Old Irish -igidir (whence also Scottish Gaelic -ich), originally a denominative verb formative, from Proto-Celtic *-sagyetor; compare Welsh -hau.

• (Munster) IPA^(key): /ɪɟ/ (post-consonantal)
• (Munster) IPA^(key): /ɟ/ (post-vocalic)
• (Connacht) IPA^(key): /iː/ (post-consonantal)
• (Ulster) IPA^(key): /i/ (post-consonantal)
• (Ulster, Connacht) IPA^(key): /j/ (post-vocalic)

-igh

1. Suffix used to form verbs from nouns; semi-productive in modern Irish.

• Affixed verbs ending in -igh form a sizeable number of second-conjugation verbs. Many monosyllabic verbs in Irish (which historically are not from affixes), however, are of the first conjugation.

  First-conjugation verbs (which are not a result of affixation):

  léigh (“to read”)

  ligh (“to lick”)

  nigh (“to wash”)

  dóigh (“to burn”)

  suigh (“to sit”) (originally suidh)

  súigh (“to suck”)

• -áil