krouo denotes knocking, whether at a literal door or in calls framed by the opening of a door.

The attested use is knocking in connection with a door or its opening: Peter knocks at a gate door, a returning lord knocks for immediate entry, and those who knock are described in relation to a door being opened. The same action frames the imperatives in Matthew 7:7 and Luke 11:9, while Revelation 3:20 joins standing at the door, knocking, hearing, and opening.

1. Knocking in relation to entry or opening · dominant

   In Acts 12:13 the aorist participle occurs when someone acts at the gate door, and in Acts 12:16 the present participle describes Peter continuing the action until the door is opened. In Matthew 7:7 and Luke 11:9, the second-person present forms stand beside the promised opening; Luke 13:25 places the present infinitive outside a shut door with the request, "Lord, open to us."

   Acts 12:13Acts 12:16Matthew 7:7Luke 11:9Luke 13:25Revelation 3:20

In the Anselm Project Bible: Across the supplied verses, the APB consistently presents the action with forms of "knock," including "continued knocking" and "knocks." These renderings confirm the verse-level action rather than establish separate lexical senses.