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demulcent (adj.)

"soothing, allaying irritation;" as a noun, "a medicine which assuages the effects of irritation," 1732, from Latin demulcentem (nominative demulcens), present participle of demulcere "to stroke down, soothingly pet," from de "down" (see de-) + mulcere "to stroke, caress," from PIE *m(o)lk-eie- "to touch repeatedly," source also of Sanskrit mrsase "to touch." De Vaan writes that connection with *meig-, the root of mulgere "to milk," "is possible, but unproven." The obsolete verb demulce "soothe, soften, mollify" is attested from 1520s.