expression, godan verb (-su)
erase one's presence; hide one's presence; kill one's aura
Used when someone deliberately suppresses their presence, breathing, or footsteps to avoid detection. Often appears in contexts of stealth, ninja-like concealment, or tense situations.
彼は気配を殺して敵の背後に忍び寄った。
He erased his presence and crept up behind the enemy.
気配
If you hide while killing your presence, no one will find you.