懸けんの先せんMeanings1expression, nounseizing the initiative by attacking firstmartial arts›Martial arts term for preempting an opponent's attack by striking first, often contrasted with 先の先 (せんのせん).See also: 先の先 (せんのせん)剣けん道どうでは、懸けんの先せんを取とることが重じゅう要ようだ。In kendo, it is important to seize the initiative by attacking first.