栓

Kanji: 栓
Level: N1
Meaning: plug, stopper
On'yomi: セン
Strokes: 10
Common compounds: 水道栓 (すいどうせん) faucet; 活栓 (かっせん) stopcock; 元栓 (もとせん) main stopcock
Memory hook: This kanji combines wood (木) with a spring (泉, here simplified to 泉-like component), suggesting a wooden plug used to stop a flow, like a spring.