c. 1500, "to make a loud, sharp sound," of imitative origin, or a blend of clap and crash. Compare Dutch kletsen "splash, clash," German klatschen, Danish klaske "clash, knock about." Figurative sense, in reference to non-physical strife or battle, is first attested 1620s. Of things, "to come into collision," from 1650s; of colors, "to go badly together," by 1867. Related: Clashed; clashing.
1510s, "sharp, loud noise of collision," from clash (v.). Especially of the noise of conflicting metal weapons. Meaning "hostile encounter" is from 1640s; meaning "conflict of opinions, etc." is from 1781.
early 15c., "collide, clash in hostility," from Latin concurrere "to run together, assemble hurriedly; clash, fight," in transferred use, "to happen at the same time," from assimilated form of com "together" (see con-) + currere "to run" (from PIE root *kers- "to run"). Sense of "to coincide, happen at the same time" is 1590s; that of "to agree in opinion" is 1580s in English.
1560s, "a chafing, rubbing," from French friction (16c.) and directly from Latin frictionem (nominative frictio) "a rubbing, rubbing down," noun of action from past-participle stem of fricare "to rub, rub down," which is of uncertain origin. Watkins suggests possibly from PIE root *bhreie- "to rub, break." De Vaan suggests a PIE bhriH-o- "to cut" and compares Sanskrit bhrinanti, Old Church Slavonic briti "to shave." Sense of "resistance to motion" is from 1722; figurative sense of "disagreement, clash, lack of harmony, mutual irritation" first recorded 1761. Related: Frictional.
early 15c., "a combination for some purpose, cooperation" (a sense now archaic or obsolete), from Old French concurrence (14c.) or directly from Medieval Latin concurrentia "a running together," from concurrens, present participle of concurrere "to run together, assemble hurriedly; clash, fight," in transferred use, "to happen at the same time," from assimilated form of com "together" (see con-) + currere "to run" (from PIE root *kers- "to run").
Sense of "occurrence together in time, coincidence" is from c. 1600. Meaning "accordance in opinion" is from 1660s.
late 14c., "acting in conjunction, contributing to the same effect or event," from Old French concurrent or directly from Latin concurrentem (nominative concurrens), present participle of concurrere "to run together, assemble hurriedly; clash, fight," in transferred use, "to happen at the same time" (see concur). Related: Concurrency; concurrently.
Meaning "running together side by side" is from late 15c. Meaning "combined, joint" is from 1530s. In law, concurrent jurisdiction (that possessed equally by two courts and if exercised by one not usually assumed by the other) is recorded from 1767.
late 14c., "a moving, running, or flowing together; a gathering or accumulation," from Old French concours and directly from Latin concursus "a running together," from past participle of concurrere "to run together, assemble hurriedly; clash, fight," from assimilated form of com "together" (see con-) + currere "to run" (from PIE root *kers- "to run").
From early 15c. as "an assembly, a throng." Sense of "open space in a built-up place," especially a gathering place in a railway station, etc., is American English, 1862. From French, English took concours d'lgance"a parade of vehicles in which the entrants are judged according to the elegance of their appearance" [OED], by 1923.
neuter possessive pronoun; late 16c., from it + genitive/possessive ending 's (q.v.). "[A]t first commonly written it's, a spelling retained by some to the beginning of the 19c." [OED]. The apostrophe came to be omitted, perhaps because it's already was established as a contraction of it is, or by general habit of omitting apostrophes in personal pronouns (hers, yours, theirs, etc.).
The neuter genitive pronoun in Middle English was his, but the clash between grammatical gender and sexual gender, or else the application of the word to both human and non-human subjects, evidently made users uncomfortable. Restriction of his to the masculine and avoidance of it as a neuter pronoun is evidenced in Middle English, and of it and thereof (as in KJV) were used for the neuter possessive. In literary use, his as a neuter pronoun continued into the 17c. In Middle English, simple it sometimes was used as a neuter possessive pronoun (c. 1300).
