0
It is neis iawn or
braf iawn.
As an adjective: right
As a noun: right; atonement.
As an adverb: very ("da iawn")
'very' = 'iawn' in Welsh. It must come after the adjective, for example 'very important' would be 'pwysig iawn'.
Ydych chi'n iawn?
... it means lol as in laugh out loud and da iawn means very good so lol very good