σύδην
From LSJ
ἢν μή τις ὥσπερ σφηκιὰν βλίττῃ με κἀρεθίζῃ → may no one squeeze me and tease me like a wasp | may no one smoke me and tease me like a wasp | but if anyone annoys me and rifles my nest, they'll find a wasp inside | still if you wake a wasps' nest then of wasps you must beware
English (LSJ)
[ῠ], Adv., (σεύω)
A impetuously, hurriedly, ς . . . αἴρονται φυγήν A.Pers.480.
German (Pape)
[Seite 972] (σεύω) adv., mit Ungestüm, heftig, σύδην κατ' οὖρον οὐκ εὔκοσμον αἴρονται φυγήν, Aesch. Pers. 492.
Greek (Liddell-Scott)
σύδην: [ῠ], Ἐπίρρ. (σεύω) ταχέως καὶ ὁρμητικῶς, μετὰ σπουδῆς, σ. αἴρεσθαι φυγὴν Αἰσχύλ. Πέρσ. 480.