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accent (v.)[accent 词源字典]: "to pronounce with accent or stress," 1520s, from Middle French accenter, from Old French acenter, from acent (see accent (n.)). Related: Accented; accenting.[accent etymology, accent origin, 英语词源]
accentuate (v.): 1731, from Medieval Latin accentuatus, past participle of accentuare "to accent," from Latin accentus (see accent (n.)). Originally "to pronounce with an accent;" meaning "emphasize" is recorded from 1865.
You've got to accentuate the positive
Eliminate the negative
Latch on to the affirmative
Don't mess with Mister In-Between

["Ac-Cent-Tchu-Ate the Positive," 1944, music by Harold Arlen, lyrics by Johnny Mercer]
Related: Accentuated; accentuating.
accentuation (n.): 1690s, from Medieval Latin accentuationem (nominative accentuatio) "intoning, chanting," noun of action from past participle stem of accentuare (see accentuate).
accept (v.): late 14c., "to take what is offered," from Old French accepter (14c.) or directly from Latin acceptare "take or receive willingly," frequentative of accipere "receive," from ad- "to" (see ad-) + capere "to take" (see capable). Related: Accepted; accepting.
acceptability (n.): 1660s, from Late Latin acceptabilitas, from Latin acceptabilis "worthy of acceptance" (see acceptable).
acceptable (adj.): late 14c., from Old French acceptable, from Latin acceptabilis "worthy of acceptance," from acceptare "take or receive willingly" (see accept). Related: Acceptably.
acceptance (n.): 1570s, from Middle French acceptance, from accepter (see accept). Earlier in same sense was acceptation (late 14c.).
access (n.): early 14c., "an attack of fever," from Old French acces "onslaught, attack; onset (of an illness)" (14c.), from Latin accessus "a coming to, an approach," noun use of past participle of accedere "to approach" (see accede). The later senses are directly from Latin. Meaning "an entrance" is from c. 1600. Meaning "habit or power of getting into the presence of (someone or something)" is from late 14c.
access (v.): 1962, originally in computing, from access (n.). Related: Accessed; accessing.
accessibility (n.): c. 1800, from accessible + -ity.
accessible (adj.): c. 1400, "affording access," from Middle French accessible, from Late Latin accessibilis, verbal adjective from Latin accessus "a coming near, approach" (see access (n.)). Meaning "easy to reach" is from 1640s; Of art or writing, "able to be readily understood," 1961 (a term not needed in the years before writing or art often deliberately was made not so).
accession (n.): "act of coming to a position," especially of a throne, 1640s, from Latin accessionem (nominative accessio) "a going to, joining, increase," noun of action from past participle stem of accedere "approach, enter upon" (see accede).
accessorize (v.): 1939, from accessory + -ize. Related: Accessorized; accessorizing.
accessory (n.): also accessary, early 15c. as a legal term in the criminal sense of "one aiding in a crime;" also "that which is subordinate to something else," from Late Latin accessorius, from accessor, agent noun from accedere "to approach" (see accede). Attested from 1896 as "woman's smaller articles of dress;" hence accessorize.
accessory (adj.): 1550s, "subordinate," from Late Latin accessorius, from accessor, agent noun from accedere "to approach" (see accede). Meaning "aiding in crime" is from c. 1600.
accidence (n.): late 14c., in philosophy, "non-essential or incidental characteristic," also "part of grammar dealing with inflection" (mid-15c.), in some cases a misspelling of accidents, or else directly from Latin accidentia (used as a term in grammar by Quintilian), neuter plural of accidens, present participle of accidere (see accident). The grammar sense is because they change in accordance with use.
accident (n.): late 14c., "an occurrence, incident, event," from Old French accident (12c.), from Latin accidentem (nominative accidens), present participle of accidere "happen, fall out, fall upon," from ad- "to" (see ad-) + cadere "fall" (see case (n.1)). Meaning grew from "something that happens, an event," to "something that happens by chance," then "mishap." Philosophical sense "non-essential characteristic of a thing" is late 14c. Meaning "unplanned child" is attested by 1932.
accidental (adj.): late 14c., "non-essential," from Old French accidentel or directly from Medieval Latin accidentalis, from Latin accidentem (see accident). Meaning "outside the normal course of nature" is from early 15c.; that of "coming by chance" is from 1570s.
accidental (n.): late 14c., "non-essential quality," from accidental (adj.). The musical sense is from 1868.
accidentally (adv.): late 14c., "non-essentially," also "unnaturally," from accidental + -ly (2). Meaning "unintentionally" is recorded from 1580s; phrase accidentally on purpose is recorded from 1862.