na-adjective
deadly; horrible; punishing; murderous
Used figuratively to describe something extremely severe, intense, or unbearable, often in casual or emphatic contexts. Not typically used for literal murder.
今日の暑さは殺人的だ。
Today's heat is murderous.
殺人的なスケジュールで倒れそうだ。
I feel like I'm going to collapse under this punishing schedule.