O.
O has three sounds.
1. Both long and short: long, somewhat like o in more; as, mòr great, òr gold, dòchas expectation; short, like o in hot; as, mo my, do thy, dochann harm.
2. Both long and short: long, nearly like o in old; as, lom bare, toll a hole; short, as, lomadh making bare, tolladh boring.
3. Both long and short, like (2) a7: long, as, foghlum to learn; short, as, roghuinn choice, logh to forgive.