斬殺線

1. • kill threshold the critical health point cutoff at which an enemy can be finished off immediately

     gaming

2. • (slang) a critical survival threshold a point beyond which a person or household lacks sufficient buffer such that a single shock leads to rapid collapse

     fig.

Character by character

• 斬(zhǎn)behead
• 殺(shā)kill
• 線(xiàn)thread