Emily Dickinson Lexicon

IN-SENS'I-BLE, a. [Fr. and Sp. from L. in and sensus, sense, sentio, to feel.]

1. Imperceptible; that can not be felt or perceived. The motion of the earth is insensible to the eye. A plant grows, and the body decays by insensible degrees. The humors of the body are evacuated by insensible perspiration. The dense and bright light of the circle will obscure the rare and weak light of these dark colors round about it, and render them almost insensible. Newton.
2. Destitute of the power of feeling or perceiving; wanting corporeal sensibility. An injury to the spine often renders the inferior parts of the body insensible.
3. Not susceptible of emotion or passion; void of feeling; wanting tenderness. To be insensible to the sufferings of our fellow men is inhuman. To be insensible of danger is not always evidence of courage.
4. Dull; stupid; torpid.
5. Void of sense or meaning; as, insensible words.