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early 15c., from Middle French palliatif (14c.) or directly from Medieval Latin palliativus "under cloak, covert," from Late Latin palliatus (see palliate). As a noun, recorded from 1724.
palliative pal·li·a·tive (pāl'ē-ā'tĭv, -ē-ə-tĭv)adj. Relieving or soothing the symptoms of a disease or disorder without effecting a cure.