► 名詞先手  [せんて]  [
先手を打つ]    
meaning:  first  rank: 4☆ 
問題が
大きくなる
前に先手を
打とう ⇨ Take a preemptive action before the problem gets bigger
☆ 
敵の先手を
取ることが
重要だ ⇨ It’s important to act before the enemy
More examples:- 恋愛は先手必勝だ ⇨ In love, you have to strike first to win (before your rivals)