Mbaya and mbadaye, I heard in forvo that you hardly pronounce the 'y' sound.
The y is more pronounced silently/lightly - I would rather argue that the e is dropped and not pronounced, making the y less prominent. but with mbaya it IS pronounced :) (it is NOT "mbaa" ;)) The y in Swahili is the palatal fricative, which is not very poignant either way.
do we know how to pronounce the words with m-consonant, its a little hard as an english speaker! especially m-pishi and m-bay
M as an entirely separate syllable. "Mmmmm", but just one letter is how I've been saying it.