This is a handy Welsh/English dictionary. The search feature handles mutations pretty well, and most of the words I try to find are included.
I wish that the English side focused less on a full English definition of the word, including English phrases and variants, and more on equivalent Welsh phrases and idioms. Looking up an English word does give you a list of Welsh equivalents but no context is given. And when you go to the Welsh word or phrase listing, there is just the one-word English translation, with no further explanation.
I would like to see better context and connotations given for Welsh words so that I know the exact shade of meaning and the forms of the word or idioms and how to properly use them.
But still, it's a useful dictionary and I appreciate it greatly.