ὥσπερ ἀνέµου 'ξαίφνης ἀσελγοῦς γενοµένου → just as when a wind suddenly turns foul, just as when a wind suddenly turns nasty
P. and V. ὀφείλειν.
I ought: use also P. and V. πρέπει με or μοι, προσήκει με or μοι, χρή με.
See anything, aught.