Consan (e.g. b, d, t) a bhfuil guta caol – i nó e – ag teacht roimhe nó ina dhiaidh. (A consonant (e.g. b, d, t) that has a slender vowel – i or e – coming before or after it.)
Samplaí: (Examples:)
binn (sweet (of music))
ciúin (quiet)
bille (a bill)