ὥσπερ ἀνέµου 'ξαίφνης ἀσελγοῦς γενοµένου → just as when a wind suddenly turns foul, just as when a wind suddenly turns nasty
Use adj., P. and V. πολέμιος, ἐχθρός, ἐναντίος, Ar. and V. δάϊος, δᾷος, δυσμενής.
