late 16th cent. (in the sense causing spiritual death): from Latin lethalis, from lethum, a variant (influenced by Greek lēthēforgetfulness), of letumdeath
lethal 致命的,致死的 词源:该词来源于拉丁文Lethe阴间黑的列蒂河,喝其水就忘过去,如同中国人所说的孟婆汤,喝了它就死了。 eg.Bitten by that poisonous snake will cause people in the lethal position.被那条毒蛇咬到会置人于死地。