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 詞源:該詞來源于拉丁文Lethe陰間黑的列蒂河,喝其水就忘過去,如同中國人所說的孟婆湯,喝了它就死了。 eg.Bitten by that poisonous snake will cause people in the lethal position.被那條毒蛇咬到會置人于死地。