"alleviate without curing," early 15c., from Medieval Latin palliatus, literally "cloaked," from past participle of Late Latin palliare "cover with a cloak, conceal," from Latin pallium "cloak" (see pall (n.)). Related: Palliated; palliating; palliation.
palliate pal·li·ate (pāl'ē-āt')
v. pal·li·at·ed, pal·li·at·ing, pal·li·ates
To reduce the severity of; to relieve somewhat.