INSENSITIVE
insensitive
(adjective) not responsive to physical stimuli; “insensitive to radiation”
insensitive
(adjective) deficient in human sensibility; not mentally or morally sensitive; “insensitive to the needs of the patients”
Source: WordNet® 3.1
Etymology
Adjective
insensitive (comparative more insensitive, superlative most insensitive)
Not expressing normal physical feeling
Not expressing normal emotional feelings; cold; tactless; undiplomatic
Synonyms
• unaffected
• unsensitive
Antonyms
• sensitive
Source: Wiktionary
In*sen"si*tive, a.
Definition: Not sensitive; wanting sensation, or wanting acute sensibility.
Tillotson. Ruskin.
Source: Webster’s Unabridged Dictionary 1913 Edition