Lenitive /(-tĭv)/

Len·i·tive

Lenitive

a.
  1. Having the quality of softening or mitigating, as pain or acrimony; assuasive; emollient.

Lenitive

n.
  1. A medicine or application that has the quality of easing pain or protecting from the action of irritants. (Med.)
  2. That which softens or mitigates; that which tends to allay passion, excitement, or pain; a palliative.
    There is one sweet lenitive at least for evils, which Nature holds out; so I took it kindly at her hands, and fell asleep.