[usu. as complement]without one's mental faculties, typically a result of violence or intoxication; unconscious
（尤指因暴力、酒醉）失去知觉的，不省人事的
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they knocked each other insensible with their fists 他们用拳头把对方击得失去知觉
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insensible with drink .喝酒喝得不省人事。
(especially of a body or bodily extremity)numb; without feeling
（尤指身体、肢体末端）麻木的；无感觉的
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the horny and insensible tip of the beak .角质的无感觉喙端。
[predic.](
（对… ）毫无察觉的；漠不关心的
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they slept on, insensible to the headlight beams .他们继续睡着，未察觉那车前灯的光束。
without emotion; callous
无情的；冷酷的。
too small or gradual to be perceived; inappreciable
不被察觉的；微不可辨的
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varying by insensible degrees .以不被察觉的程度改变。
"late Middle English （also in the senses ‘unable to be perceived' and ‘incapable of physical sensation’）： partly from Old French