Is there a longer version of this word. I remember there being a word similar but a lot longer in school
You might be thinking of 'sglefrio iâ' = 'ice skating' or 'bwrddsglefrio' for 'skateboarding'
It was the word for skateboarding but more along the lines of "sglefrfyrddiadau".
'sglefrfyrddiadau' would be one possible spelling of the plural noun 'skateboards'
I wonder how old this word goes back to historically, if it's original meaning actually ment 'skate' or something else, on the presumption that skating seems to be a relatively recent thing.