This is the 17860th most frequent Russian word.
услышишь
"You will hear."
'услышишь' means 'you will hear' in the future tense. It implies an ability or action to perceive sounds or information by listening with intention.
Когда ты внимательно слушаешь, ты услышишь важные детали.
When you listen attentively, you will hear important details.
Here 'услышишь' contextualizes how the speaker will perceive sounds emanating from the action (knocking), emphasizing the conditional causality of the action.
Если ты постучишь, я услышу тебя за дверью.
If you knock, I will hear you behind the door.
In this sentence, 'услышишь' symbolizes gaining understanding or comprehension of intangible concepts like 'truth' through perceptive listening and experiencing.