mustache (n.)youdaoicibaDictYouDict[mustache 词源字典]
1580s, from French moustache (15c.), from Italian mostaccio, from Medieval Greek moustakion, diminutive of Doric mystax (genitive mystakos) "upper lip, mustache," related to mastax "jaws, mouth," literally "that with which one chews," from PIE root *mendh- "to chew" (see mandible).

Borrowed earlier (1550s) as mostacchi, from the Italian word or its Spanish derivative mostacho. The plural form of this, mustachios, lingers in English. Slang shortening stache attested from 1985. Dutch slang has a useful noun, de befborstel, to refer to the mustache specifically as a tool for stimulating the clitoris; probably from beffen "to stimulate the clitoris with the tongue."[mustache etymology, mustache origin, 英语词源]
neurotic (adj.)youdaoicibaDictYouDict
1775, "acting upon or stimulating the nerves," from Greek neuron "nerve" (see neuro-) + -otic, as in hypnotic. Sense of "affected by neurosis" is 1887. The noun meaning "a neurotic person" is from 1896. Related: Neurotically.
pacemaker (n.)youdaoicibaDictYouDict
also pace-maker, 1884, originally a rider or boat that sets the pace for others in training. Meaning "the node of the heart which determines the beat rate" is from 1910; sense of "man-made device for stimulating and regulating heartbeat" is from 1951. From pace (n.) + maker.
pick up (v.)youdaoicibaDictYouDict
early 14c. as a verbal phrase, "lift and take," from pick (v.) + up (adv.). Of persons, "make acquaintance or take along," especially for sexual purposes, 1690s. Meaning "cause (someone) to revive" is from 1857. Sense of "tidy up" is from 1861; that of "arrest" is from 1871; meaning "gain speed" is from 1922; meaning "to pay" (a check, tab, etc.) is from 1945. Pick-me-up "stimulating alcoholic drink" is attested from 1867.
piquant (adj.)youdaoicibaDictYouDict
1520s, from Middle French piquant "pricking, stimulating, irritating," present participle of piquer "to prick, sting, nettle" (see pike (n.2)).
stimulate (v.)youdaoicibaDictYouDict
1610s, "rouse to action," from Latin stimulatus, past participle of stimulare (see stimulation). Related: Stimulated; stimulating.
mammogenicyoudaoicibaDictYouDict
"Stimulating the development of the mammary glands; of or relating to this activity", 1930s; earliest use found in Proceedings of the Society for Experimental Biology and Medicine. From mammo- + -genic.
cholereticyoudaoicibaDictYouDict
"Stimulating the secretion of bile by the liver; designating this action or effect", 1920s; earliest use found in Journal of Pharmacological and Experimental Therapeutics. From chole- + -retic, after German choleretisch and Cholereticum respectively, both ultimately after Cholerese amount of bile secreted by the liver in a specific time.