tap
//tæp//
Noun
A device for controlling the flow of liquid or gas from a pipe or container, typically operated by turning a handle
Turn off the tap when you finish washing your hands.
A device attached to a cask or barrel to draw out liquid
He opened the tap on the barrel to pour some beer.
Verb
To strike something gently and quickly with a light blow
She tapped him on the shoulder to get his attention.
To touch or strike something lightly, especially to get someone's attention
She tapped him on the shoulder to get his attention.
To exploit or draw upon a resource or supply
The company is tapping new markets in Asia.
To secretly intercept or monitor telephone or electronic communications
The police tapped his phone to gather evidence.
Noun
A light, quick blow or the sound made by such a blow
I heard a tap on the window.