BETIDE Meaning of BETIDE in English v. (only in infin. and 3rd sing. subj.) 1 tr. happen to (woe betide him). 2 intr. happen (whate'er may betide). [ ME f. obs. tide befall f. OE tidan ] Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012