Let’s have a look at how to pronounce the BL sound in Gaelic.
In Gaelic, bl has two distinct sounds, depending on whether it occurs next to a broad vowel (a, o, u) or a slender vowel (e, i). The broad bl can be heard in blas (a taste):
a nice taste
The broad bl sound can also be heard in ablach (a wreck):
A wreck of a car
The slender bl can be heard in bliadhna (a year):
Happy new year!