This is the 4003rd most frequent Japanese word.
ツマミ
A "snack" or "appetizer," often served with alcohol.
In this sentence, 'ツマミ' refers to a knob or dial used for controlling devices such as a television or radio.
テレビのツマミを回して、音量を調節してください。
Turn the dial on the TV to adjust the volume.
Here, 'ツマミ' (or 'おつまみ' in its polite form) is used to mean snacks or side dishes, typically served with alcohol.
お酒のおつまみに、枝豆を頼もう。
Let's order edamame as snacks to go with the drinks.
In this context, 'ツマミ' is used to describe the handle or knob used to operate a door.