1. Incapable of physical sensation
   "insensible to pain"; "insensible earth" 
2. Unaware of or indifferent to
   "insensible to the suffering around him"
   - unaffected 
3. Barely able to be perceived
   "an almost insensible change"
   - indiscernible, undetectable 
4. Unresponsive to stimulation
   "he lay insensible where he had fallen"
   - senseless

See also: anaesthetic [Brit, Cdn], anesthetic [N. Amer], asleep, benumbed, imperceptible, incognisant [Brit], incognizant, insensibility, insensibly, insensitive, numb, unaware, unconscious, unperceivable

Antonym: sensible

• visual defect
• visual disorder
• visual display unit
• visual field
• visual hallucination
• visual image
• visual impairment
• visual joke
• visual modality
• visual percept
• visual perception
• visual property
• visual purple
• visual range
• visual sensation
• visual sense
• visual signal
• visual space
• visual system
• visualisation
• visualise
• visualised
• visualiser
• visualization
• visualize