fadó is an Irish term meaning "long ago" (see once upon a time#Translations), but i don't know what class of word it is. --Jerome Potts (talk) 05:17, 23 August 2012 (UTC)
- I would call it an adverb (compare olim#Latin), but User:Angr is an expert in Irish linguistics, so if I were you I would ask him. --Μετάknowledgediscuss/deeds 05:24, 23 August 2012 (UTC)