tap

To make use of or draw upon a resource or supply.

"We need to tap into new markets."

To hit something gently and quickly, often making a soft sound.

"She tapped her foot impatiently."

A device controlling the flow of liquid, especially water, from a pipe.

"Please turn off the kitchen tap."

To secretly connect a device to a phone line to listen to calls.

"The police tapped his phone."