What is the Welsh word for excellent?

There isn't a single perfect Welsh word for "excellent" as it depends on the context and what you want to emphasize. Here are a few options:

General Excellence:

* Rhagorol: This is a good general word for "excellent" and translates literally as "superior".

* Gwych: This is another good general option meaning "splendid" or "marvelous".

* Rhagorol iawn: This means "very excellent" and emphasizes the high quality.

* Anhygoel: This word means "incredible" or "unbelievable" and conveys a sense of amazement.

Specific Excellence:

* Arbennig: This means "special" or "exceptional" and emphasizes the unique quality of something.

* Diddorol: This means "interesting" and implies that something is intellectually stimulating.

* Hefyd: This means "also" and can be used to add emphasis to another adjective describing something excellent.

The best word to use will depend on the situation and what you want to express.