insensible
adjective /ɪnˈsensəbl/
  /ɪnˈsensəbl/
(formal)- [not before noun] insensible (to something) unable to feel something or react to it(对某事物)无感觉,无反应能力,麻木 - insensible to pain/cold感觉不到疼痛/冷 
 
- insensible to pain/cold
- [not before noun] insensible (of something) not aware of a situation or of something that might happen未察觉;意识不到 - They were not insensible of the risks.他们对这些危险并非没有意识。 
 
- They were not insensible of the risks.
- unconscious as the result of injury, illness, etc.失去知觉;昏迷 - He drank himself insensible.他喝酒醉得不省人事。 
 More Like This Words that look like opposites, but aren’tWords that look like opposites, but aren’t- different / indifferent
- interested / disinterested
- famous / infamous
- flammable / inflammable
- savoury / unsavoury
- sensible / insensible
- valuable / invaluable
 
- He drank himself insensible.
词源late Middle English (also in the senses ‘unable to be perceived’ and ‘incapable of physical sensation’): partly from Old French insensible (from Latin insensibilis, from in- ‘not’ + sensibilis, from sensus ‘sense’), partly from in- ‘not’ + sensible.