σφαδαστικῶς
From LSJ
ἀξιοπιστόστερα εἰσί τραύματα φίλου ἢ ἐκούσια φιλήματα ἐχθροῦ → faithful are the wounds of a friend; but the kisses of an enemy are deceitful
English (LSJ)
Adv. A convulsively, Eust.1693.5.
Greek (Liddell-Scott)
σφᾰδαστικῶς: Ἐπίρρ., μετὰ σπασμῶν, σπασμωδῶς, Εὐστάθ. 1693. 5.