tap in Chinese

A conical peg or pin used to close and open the hole or vent in a container.

(mechanics) A cylindrical tool used to cut an internal screw thread in a hole, with cutting edges around the lower end and an upper end to which a handle is fitted to turn the tool.

To break into or open up (a thing) so as to obtain something; to exploit, to penetrate; tap into.

(communication, chiefly, law enforcement) To connect a listening and/or recording device to (a communication cable or device) in order to listen in secretly on telephone calls or other communications; also, to secretly listen in on and/or record (a telephone call or other communication). [from 19th c.]