Κρούω
[in LXX: before ἐπί Jdg.19:22, Sng.5:2 (דָּפַק) ;]
with, accusative, τ. αὐλαίαν, Jdth.14:14 * ;]
to strike, knock: at a door (Κόπτειν, in Att..), Mat.7:7-8, Luk.11:9-10 12:36, Act.12:16, Rev.3:20; with accusative, τ. θύραν, Luk.13:25, Act.12:13.†
(AS)