The kanji 栓(せん) primarily means "stopper," "plug," or "cork." It refers to an object used to close or seal a hole, container, or opening, preventing the flow of liquid or gas.

・On-yomi (音読み): セン ・Kun-yomi (訓読み): せん

⚫︎栓抜き (せんなき) Translation: Bottle opener ⚫︎ガス栓 (ガスせん) Translation: Gas valve ⚫︎消火栓 (しょうかせん) Translation: Fire hydrant

The kanji 栓 is a phono-semantic compound (形声文字). The left side is 木 (ki) which means "wood," and the right side is 㐱(shin), which is an old character now used phonetically. The character originally depicted a wooden stopper. The phonetic component, 㐱, contributes to the sound. The combination of the "wood" radical and the phonetic component indicates a stopper made of wood.