stubble (n.)youdaoicibaDictYouDict[stubble 词源字典]
c. 1300, "stumps of grain stalks left in the ground after reaping," from Old French estuble "stubble" (Modern French éteule), from Vulgar Latin stupla, reduced form of Latin stipula "stalk, straw" (see stipule). Applied from 1590s to bristles on a man's unshaven face.[stubble etymology, stubble origin, 英语词源]
stubbly (adj.)youdaoicibaDictYouDict
c. 1600, from stubble (n.) + -y (2). Related: Stubbliness.
stubborn (adj.)youdaoicibaDictYouDict
late 14c., of uncertain origin. Earliest form is stiborn. OED, Liberman doubt any connection with stub (n.). Related: Stubbornly; stubbornness.
stubby (adj.)youdaoicibaDictYouDict
"short and thick," 1570s, from stub (n.) + -y (2); of persons, from 1831.
stucco (n.)youdaoicibaDictYouDict
fine plaster used as a wall coating, 1590s, from Italian stucco, from a Germanic source (compare Old High German stukki "crust, piece, fragment"), from Proto-Germanic *stukkjam, from PIE root *(s)teu- (1) "to push, stick, knock, beat" (see stock (n.1)). The verb is attested from 1726. Related: Stuccoed; stuccoing.
stuck (adj.)youdaoicibaDictYouDict
"unable to go any further," 1885, past participle adjective from stick (v.). Colloquial stuck-up "offensively conceited, assuming an unjustified air of superiority" is recorded from 1829.
stud (n.1)youdaoicibaDictYouDict
"nailhead, knob," late 13c., from Old English studu "pillar, prop, post," from Proto-Germanic *stud- (cognates: Old Norse stoð "staff, stick," properly "stay," Middle High German stud, Old English stow "place"), from PIE *stu-, variant of root *sta- "to stand" (see stet). Sense expanded by late 14c. to include ornamental devices fixed in and projecting from a surface. From the Old English meaning comes the specific sense "one of the small beams of a building which form a basis for the walls."
stud (n.2)youdaoicibaDictYouDict
"horse used for breeding," Old English stod "herd of horses, place where horses are kept for breeding," from Proto-Germanic *stodo (cognates: Old Norse stoð, Middle Low German stod, Old High German stuot "herd of horses," German Stute "mare"), from PIE root *sta- "to stand," with derivatives meaning "place or thing that is standing" (cognates: Old Church Slavonic stado "herd," Lithuanian stodas "a drove of horses;" see stet). Sense of "male horse kept for breeding" is first recorded 1803; meaning "man who is highly active and proficient sexually" is attested from 1895; that of "any young man" is from 1929. Stud-poker (1864) is said to be from stud-horse poker, but that phrase is not found earlier than 1879.
stud (v.)youdaoicibaDictYouDict
c. 1500, "set with studs;" 1560s in studded with "as though sprinkled with nails with conspicuous heads;" from stud (n.1).
student (n.)youdaoicibaDictYouDict
late 14c., from Old French estudiant "student, scholar, one who is studying" (Modern French étudiant), noun use of past participle of estudiier, from Medieval Latin studiare "to study," from Latin studium (see study (v.)). Student-teacher of a teacher in training working in a classroom is from 1851, American English.
studied (adj.)youdaoicibaDictYouDict
1520s, "learned;" c. 1600, "studiously elaborate," past participle adjective from study (v.).
studio (n.)youdaoicibaDictYouDict
1819, "work-room of a sculptor or painter," usually one with windows to admit light from the sky, from Italian studio "room for study," from Latin studium (see study (v.)). Motion picture sense first recorded 1911; radio broadcasting sense 1922; television sense 1938. Studio apartment first recorded 1903.
studious (adj.)youdaoicibaDictYouDict
mid-14c. (implied in studiously) "zealous, diligent, eager," from Latin studiosus "devoted to study, assiduous, zealous," from studium "eagerness, zeal" (see study). From late 14c. as "eager to learn, devoted to learning," also, as noun, "those who study or read diligently." Related: Studiousness.
studly (adj.)youdaoicibaDictYouDict
by 1971, American English, from stud (n.2) in the "virile male" sense + -ly (1). Related: Studliness.
study (v.)youdaoicibaDictYouDict
early 12c., "to strive toward, devote oneself to, cultivate" (translating Latin occupatur), from Old French estudiier "to study, apply oneself, show zeal for; examine" (13c., Modern French étudier), from Medieval Latin studiare, from Latin studium "study, application," originally "eagerness," from studere "to be diligent" ("to be pressing forward"), from PIE *(s)teu- (1) "to push, stick, knock, beat" (see steep (adj.)).
Martha swanc and becarcade to geforðigene þan Hælende and his þeowen þa lichamlice behefðen. Seo studdede emb þa uterlice þing. [Homily for the Feast of the Virgin Mary, c.1125]
From c. 1300 as "apply oneself to the acquisition of learning, pursue a formal course of study," also "read a book or writings intently or meditatively." From mid-14c. as "reflect, muse, think, ponder." Meaning "regard attentively" is from 1660s. Related: Studied; studying.
study (n.)youdaoicibaDictYouDict
c. 1300, "application of the mind to the acquisition of knowledge, intensive reading and contemplation of a book, writings, etc.," from Old French estudie "care, attention, skill, thought; study, school" (Modern French étude), from Latin studium "study, application" (see study (v.)). Also from c. 1300 as "a state of deep thought or contemplation; a state of mental perplexity, doubt, anxiety; state of amazement or wonder." From mid-14c. as "careful examination, scrutiny." Sense of "room furnished with books" is from late 14c. Meaning "a subject of study" is from late 15c. Study hall is attested from 1891, originally a large common room in a college.
stuff (n.)youdaoicibaDictYouDict
early 14c., "quilted material worn under chain mail," from Old French estoffe "quilted material, furniture, provisions" (Modern French étoffe), from estoffer "to equip or stock," which according to French sources is from Old High German stopfon "to plug, stuff," or from a related Frankish word (see stop (v.)), but OED has "strong objections" to this.

Sense extended to material for working with in various trades (c. 1400), then "matter of an unspecified kind" (1570s). Meaning "narcotic, dope, drug" is attested from 1929. To know (one's) stuff "have a grasp on a subject" is recorded from 1927.
stuff (v.)youdaoicibaDictYouDict
mid-14c., "furnish with" (goods, provisions, etc.), also "reinforce" (troops), from Old French estofer "pad, upholster, fit out" (Modern French étoffer), from estoffe, and probably also in part from stuff (n.).

From c. 1400 as "fill, cram full; fill (the belly) with food or drink, gorge;" from early 15c. as "to clog" (the sinuses, etc.); from late 14c. as "fill (a mattress, etc.) with padding, line with padding;" also in the cookery sense, in reference to filing the interior of a pastry or the cavity of a fowl or beast. The ballot-box sense is attested from 1854, American English; in expressions of contempt and suggestive of bodily orifices, it dates from 1952.
stuffed (adj.)youdaoicibaDictYouDict
mid-15c., in reference to garments, "padded with stuffing," past participle adjective from stuff- (v.). Hence stuffed shirt "pompous, ineffectual person" (1913).
stuffing (n.)youdaoicibaDictYouDict
1520s, "material used for filling a cushion;" 1530s, "seasoned mixture used to stuff fowls before cooking," verbal noun from stuff (v.) in the sense "fill the inside of a bird before cooking" (late 14c.).