So how would I say "I have eaten the dog?"
Dw i wedi bwyta'r ci - but in Wales, we generally don't eat dogs :P
bwyta - to eat
bwydo - to feed
No pop-up translation is given for "bwydo'r"; but I could guess from context (and similarity to "bwyta") that it means "feed the".
Maybe "'r" should be treated as a separate word?
'R is the contraction of "Yr" which means "the." "Yr" is used before vowels and 'r is used after vowels, while "Y" is used with consonants
Sounds like a metaphor, stood alone like that.