δεινά

From LSJ

Τὸ γὰρ περισσὰ πράσσειν οὐκ ἔχει νοῦν οὐδένα → There is no sense in doing things beyond the usual measure

Sophocles, Antigone, 67-68

Greek Monolingual

επίρρ.
βλ. δεινός.

Russian (Dvoretsky)

δεινά: adv. Hom. = δεινόν I.