disturb (v.)youdaoicibaDictYouDict[disturb 词源字典]
c. 1300, "to stop or hinder," from Old French destorber (Old North French distourber) and directly from Latin disturbare "throw into disorder," from dis- "completely" (see dis-) + turbare "to disorder, disturb," from turba "turmoil" (see turbid).

Meaning "to frighten" is late 13c.; that of "to stir up, agitate" is c. 1300. Related: Disturbed; disturbing; disturbingly. Middle English also had distourbler (n.) "one who disturbs or incites" (late 14c.).[disturb etymology, disturb origin, 英语词源]
infestation (n.)youdaoicibaDictYouDict
early 15c., from Late Latin infestationem (nominative infestatio) "a troubling, disturbing, molesting," noun of action from past participle stem of infestare (see infest).
layoff (n.)youdaoicibaDictYouDict
also lay-off, lay off; 1889, "rest, respite;" from lay (v.) + off. Via seasonal labor with periodic down time, it came to have a sense of "temporary release from employment," and by 1960s was being used somewhat euphemistically for permanent releases of masses of workers by employers. The verbal phrase lay off is attested from 1868 as "dismiss" (an employee); meaning "stop disturbing" is from 1908.
shock (n.1)youdaoicibaDictYouDict
1560s, "violent encounter of armed forces or a pair of warriors," a military term, from Middle French choc "violent attack," from Old French choquer "strike against," probably from Frankish, from a Proto-Germanic imitative base (compare Middle Dutch schokken "to push, jolt," Old High German scoc "jolt, swing").

Meaning "a sudden blow" is from 1610s; meaning "a sudden and disturbing impression on the mind" is from 1705. Sense of "feeling of being (mentally) shocked" is from 1876. Medical sense is attested from 1804 (it also once meant "seizure, stroke," 1794). Shock-absorber is attested from 1906 (short form shocks attested by 1961); shock wave is from 1907. Shock troops (1917) translates German stoßtruppen and preserves the word's original military sense. Shock therapy is from 1917; shock treatment from 1938.
weird (adj.)youdaoicibaDictYouDict
c. 1400, "having power to control fate, from wierd (n.), from Old English wyrd "fate, chance, fortune; destiny; the Fates," literally "that which comes," from Proto-Germanic *wurthiz (cognates: Old Saxon wurd, Old High German wurt "fate," Old Norse urðr "fate, one of the three Norns"), from PIE *wert- "to turn, to wind," (cognates: German werden, Old English weorðan "to become"), from root *wer- (3) "to turn, bend" (see versus). For sense development from "turning" to "becoming," compare phrase turn into "become."

The sense "uncanny, supernatural" developed from Middle English use of weird sisters for the three fates or Norns (in Germanic mythology), the goddesses who controlled human destiny. They were portrayed as odd or frightening in appearance, as in "Macbeth" (and especially in 18th and 19th century productions of it), which led to the adjectival meaning "odd-looking, uncanny" (1815); "odd, strange, disturbingly different" (1820). Related: Weirdly; weirdness.
nymphetyoudaoicibaDictYouDict
"An attractive and sexually mature young girl", 1950s: from nymph + -et1. More Lolita from mid 20th century:In Vladimir Nabokov's novel Lolita ( 1958), Humbert Humbert, a man in his late 30s, becomes sexually obsessed with Dolores Haze, a 12-year-old girl whom he dubs Lolita, a pet form of Dolores. The book's disturbing subject matter created a scandal when it was published in the USA, but it gave the world two words for ‘a sexually precocious young girl’, Lolita itself and nymphet.