A small disk or knob that can be pressed to operate a device, or a decorative fastening on clothing.

A casual term meaning to intrude into a conversation or situation.

हस्तक्षेप करना

English Usage: It's rude to butt in while others are talking.

Hindi Usage: दूसरों से बात करते समय हस्तक्षेप करना अशिष्ट है।