同歸於盡

tóngguīyújìn

perish together; end up in common ruin

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tóng guī yú jìn

v. perish together

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同歸於盡|同归于尽 [tóng guī yú jìn] ► to die in such a way that sb (or sth) else also perishes ► to take sb down with oneself ► to end in mutual destruction