Incapable of being apprehended by the mind or the senses
Lacking physical feeling or sensitivity
Lacking responsiveness or alertness
Without emotion or interest
Lacking passion and emotion
Logical inference from sense is a process from sensible to insensible existence.
The pupil is widely dilated and insensible to light.
Laplace assumed that the liquid has uniform density, and that the attraction of its molecules extends to a finite though insensible distance.
Yet he could not have been insensible to the immense superiority in rhythmical smoothness which the hexameter of Lucretius has over that of Ennius and Lucilius.
On the 21st of February 1848, after having suffered a previous stroke of apoplexy, he fell insensible on the floor of the Representatives' chamber, and two days later died.