tap
UK: tæp | US: tæp
n. 1. A device for controlling the flow of liquid or gas from a pipe or container.
n. 2. A light strike or touch, often with the fingers.
vt. 1. To draw liquid from a container or pipe.
vt. 2. To strike lightly or make contact gently.
vi. 1. To make a repeated light sound.
The word "tap" originates from Old English tæppa, meaning a peg or plug used to stop the flow of liquid from a cask. Over time, it expanded to include the action of lightly striking (from the sound of tapping) and the device controlling flow. The dual meanings reflect both physical function (liquid control) and auditory/kinetic action (light contact).
She turned the tap to fill the kettle with water.
He gave a gentle tap on the window to get her attention.
The bartender tapped a new keg for the party.
Rain tapped softly against the roof all night.
The dancer’s feet tapped rhythmically on the stage.