Yes, adding 'aidd' to a noun is a common way of forming an adjective. 'Figan' would be the noun.
What is the difference between vegan and vegetarian? Why is "vegetarian" not accepted?
Vegans do not eat anything derived from an animal.
Vegetarians do not eat meat (animal muscles). But they do eat things such as eggs, milk, and honey, which are produced by animals but which do not involve killing the animal. Vegans do not eat such things.
Thank you. I know the physical differences and preference differences, I was asking about the grammatical differences and asking if there is a Welsh word for each and if they are not interchangeable.