In-sĕn'si-ble, a.
a. [Prefix in, not, and sensible; Fr. & Sp. insensible, It. insensibile, Lat. insensibilis.]
Sense 1. Destitute of the power of feeling or perceiving; wanting corporeal sensibility; as, an injury to the spine often renders the inferior parts of the body insensible.
Sense 2. Not susceptible of emotion or passion; void of feeling; wanting tenderness; dull; stupid; torpid; as, insensible to danger, fear, love, &c.
Accept an obligation without being a slave to the giver, or insensible to his kindness. Wotton.
Sense 3. Void of sense or meaning; meaningless. [Obs.]
If it make the indictment be insensible or uncertain, it shall be quashed. Hale.
Sense 4. Incapable of being perceived by the senses; imperceptible; hence, progressing by imperceptible degrees; so slow or gradual that the stages are not noted; as, insensible motion, perspiration, and the like.
They fall away, And languish with insensible decay. Dryden.
Synonyms—Imperceptible; imperceivable; dull; stupid; torpid; senseless; unfeeling; indifferent; unsusceptible; hard; callous.