obtund

turruttaa, hillitä puhekieltä To reduce the edge or effects of; to mitigate; to dull.
1900, Martha M. Allen, Alcohol, a Dangerous and Unnecessary Medicine, s:http://en.wikisource.org/wiki/Page:Alcohol,_a_Dangerous_and_Unnecessary_Medicine.djvu/319 p. 319:

(..) the use of alcoholic decoctions(..) which are given as medicines to allay pain, obtund nerve sensibility, to cure the little sufferer of his vital manifestations (..)

Small doses of opioids are also useful in obtunding airway reflexes (..)