" insensible "

1: having lost consciousness;

  * e.g., " ... if a choking person is insensible, you should lay them down on their back before performing the Heimlich maneuver "

•  Synonyms : 

•  cold,

•  senseless,

•  unconscious

•  Antonyms : 

•  conscious

2: not perceptible by a sense or by the mind;

  * e.g., " ... the fragile glass flowers can be damaged by even the most insensible tremors "

•  Synonyms : 

•  impalpable,

•  imperceptible,

•  inappreciable,

•  indistinguishable

•  Antonyms : 

•  appreciable,

•  discernible,

•  palpable,

•  perceptible,

•  ponderable,

•  sensible

3: having or showing a lack of interest or concern;

  * e.g., " ... city hall remains insensible to our complaints about the downtown parking situation "

•  Synonyms : 

•  apathetic,

•  casual,

•  complacent,

•  disinterested,

•  incurious,

•  indifferent,

•  insouciant,

•  nonchalant,

•  perfunctory,

•  pococurante,

•  unconcerned,

•  uncurious,

•  uninterested

•  Antonyms : 

•  concerned,

•  interested