veigeatóir- what a word!
Is veigeatóir mé- tabhair dom do glásraí!
Another word to describe someone as vegetarian is 'feoilseantóir' pronounced like 'fuh-yowl (as in bowl)-shan-tor' and then the adjective form of that I think is feoilseantach
Isn't this similar to the urban legend about the Welsh for vegetarian being meat refuser?
Except the word is attested in Irish, and was the original form of vegetarian, as shows by De Bhaldraithe's 1953 English-Irish Dictionary.
Why does the word for vegetarian seem so unrelated to the word for vegetable? What does it mean?
It's a direct borrowing from English. There's another word used as well, Feoilséantóir which means "meat-denier"