"Bwysig"

Translation: Important

[MrGWallCymraeg]

For most of the individual words, you can put in the mutated and non-mutated word. There might be some that we've missed and if so, please suggest through a report :)

[iamOwenG]

Am I right in thinking that 'Pwysig' is the word but it mutates to 'Bywsig' after 'yn'. Does that not then mean that when the word is on its own as it is here, it should remain unmutated?