κρουστέον
From LSJ
Δυσαμένη δὲ κάρηνα βαθυκνήμιδος ἐρίπνης / Δελφικὸν ἄντρον ἔναιε φόβῳ λυσσώδεος Ἰνοῦς (Nonnus, Dionysiaca 9.273f.) → Having descended from the top of a deep-greaved cliff, she dwelt in a cave in Delphi, because of her fear of raving/raging Ino.
English (LSJ)
A one must knock at, τηνδεδί (sc. θύραν) Ar.Ec.989.
Greek (Liddell-Scott)
κρουστέον: ῥημ. ἐπίθ., δεῖ κρούειν, τὴν θύραν Ἀριστοφ. Ἐκκλ. 989.
