mid-13c., "the act of going away, departure;" c. 1300, "separation of persons, leave-taking," also "the act of dividing or putting asunder; distribution, apportionment;" verbal noun from part (v.). From late 14c. as "the act or process of dividing; a division or separation; a dividing line, a point or place of separation or division."
late 14c., champertie, champartie, the illegal act whereby a person not otherwise interested makes a bargain to maintain a litigant in return for a share of the property in dispute if the case succeeds, from Old French champart "portion of produce received by a feudal lord from land held in lease from him" (13c.), from Medieval Latin campipartem, from campi pars "part of the field" (see campus + part (n.)).
c. 1300, partiner, "a sharer or partaker in anything," altered from parcener (late 13c.), from Old French parçonier "partner, associate; joint owner, joint heir," from parçon "partition, division. portion, share, lot," from Latin partitionem (nominative partitio) "a sharing, partition, division, distribution" from past participle stem of partire "to part, divide" (from pars "a part, piece, a share," from PIE root *pere- (2) "to grant, allot").
The form in English has been influenced by part (n.). The word also may represent Old French part tenour "part holder." From late 14c. as "one who shares power or authority with another;" the commercial sense is by 1520s. Meaning "a husband or wife, one associated in marriage with another" is from 1749.
1550s, in grammar, "to state the part of speech of a word or the words in a sentence," a verbal use of Middle English pars (n.) "part of speech" (c. 1300), from Old French pars, plural of part "a part," from Latin pars "a part, piece" (from PIE root *pere- (2) "to grant, allot") in the school question, Quae pars orationis? "What part of speech?" Transferred (non-grammatical) use is by 1788. Pars also was a common plural of part (n.) in early Middle English. Related: Parsed; parsing.
c. 1300, partie, "a part, division, section, portion," a sense now obsolete; also "physical piece, fragment; section of a book or treatise," from Old French partie "side, part; portion, share; separation, division" (12c.), literally "that which is divided," noun use of fem. past participle of partir "to divide, separate" (10c.), from Latin partire/partiri "to share, part, distribute, divide," from pars "a part, piece, a share" (from PIE root *pere- (2) "to grant, allot").
In early use the word often appears where we would have its relative part (n.). Also from c. 1300 in the legal sense "person or group of persons involved in a lawsuit, agreement, etc.," and in the political sense of "a number of persons united in supporting a person, policy, or cause." From early 14c. as any "group of people," also "a social class." Meaning "a person, a paritcular person" is from mid-15c.
The military sense of "a detached part of a larger body or company" is by 1640s. The sense of "a gathering for social pleasure" is found by 1716, from general sense of persons gathered (originally for some specific, temporary purpose, such as dinner party, hunting party).
Phrase the party is over "enjoyment or pleasant times have come to an end" is from 1937; party line is recorded by 1834 in the sense of "policy adopted by a political party," and by 1893 in the sense of "telephone line shared by two or more subscribers." Party pooper "one who casts gloom over a convivial event" is from 1951, American English.
*perə-, Proto-Indo-European root meaning "to grant, allot" (and reciprocally, "to get in return"); possibly related to *pere- (1) "to produce, procure."
It forms all or part of: apart; apartment; bipartient; bipartisan; bipartite; compartment; depart; department; ex parte; impart; jeopardy; multipartite; parcel; parse; part; partial; participate; participation; particle; particular; particulate; partisan; partition; partitive; partner; party; portion; proportion; quadripartite; repartee; tripartite.
It is the hypothetical source of/evidence for its existence is provided by: Sanskrit purtam "reward;" Hittite parshiya- "fraction, part;" Greek peprotai "it has been granted;" Latin partem (nominative pars) "a part, piece," portio "share, portion."
late 14c., "a bit or fragment, small part or division of a whole, minute portion of matter," from Latin particula "little bit or part, grain, jot," diminutive of pars (genitive partis) "a part, piece, division" (from PIE root *pere- (2) "to grant, allot"). In grammar, "a part of speech considered of minor consequence or playing a subordinate part in the construction of a sentence" (1530s). Particle physics, which is concerned with sub-atomic particles, is attested from 1969. In construction, particle board (1957) is so called because it is made from chips and shavings of wood.
"state or character of being particular; that which is particular," 1520s, from French particularité, from Late Latin particularitatem (nominative particularitas), from Latin particularis "of a part, concerning a small part" (see particular (adj.)).
late 14c., "pertaining to or affecting a single thing or person; pertaining to some and not to all," from Old French particuler (14c., Modern French particulier) and directly from Late Latin particularis "of a part, concerning a small part," from Latin particula "little bit or part, grain, jot," diminutive of pars (genitive partis) "a part, piece, division" (from PIE root *pere- (2) "to grant, allot"). Meaning "peculiar, singular, standing out from what is usual or ordinary" is by late 15c. Sense of "precise, fastidious, exacting, attentive to details" is by 1814.