活かっ栓せんかっせんMeanings1nounvalve; faucet; tapGeneral term for a device that controls the flow of liquid or gas; used in plumbing, machinery, and laboratory contexts.実じっ験けん室しつの活かっ栓せんを閉しめてください。Please close the valve in the laboratory.水すい道どうの活かっ栓せんが壊こわれて水みずが止とまらない。The faucet is broken and the water won't stop.