"alleviating pain," 1775, from Greek ant-, form of anti- used before vowels (see anti-), + algos "pain" (see -algia) + -ic. As a noun, "preparation which alleviates pain," 1753.
antagonise
antagonism
antagonist
antagonistic
antagonize
antalgic
antanaclasis
antaphrodisiac
antarchism
antarchy
antarctic