We have already said that s, when broad, is sounded like the English s, and when slender, like sh. To this rule there are some exceptions.
When followed by the labials b, n, p, or by r, s slender is pronounced like s in English.
|smig (smig), the chin||spéir (spaer), the sky|
|speal (spal), a scythe||srian (sree'-an), a bridle|
§ 205. The same is true of s preceded by r
|béal (bael), the mouth||tuirse (thirsa), weariness|
|Saoirse (shōrsa), George||réalt (raeLth), a star|
as in English