Etymology
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comrade (n.)

1590s, "one who shares the same room," hence "a close companion," from French camarade (16c.), from Spanish camarada "chamber mate," or Italian camerata "a partner," from Latin camera "vaulted room, chamber" (see camera). In Spanish, a collective noun referring to one's company. In 17c., sometimes in jocular use misspelled comrogue. Used from 1884 by socialists and communists as a prefix to a surname to avoid "Mister" and other such titles. Related: Comradely; comradeship.

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camaraderie (n.)
"companionship, good-fellowship," 1840, from French camaraderie, from camarade "comrade" (see comrade).
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comradery (n.)

"state or feeling of a comrade," 1862, an attempt to nativize camaraderie. Comradeship is attested from 1815.

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contubernal (n.)

"one who occupies the same tent," 1842, from Latin contubernalis "tent-companion, comrade," noun use of adjective, from assimilated form of com "with, together" (see con-) + taberna "hut, tent" (see tavern).

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amigo (n.)
"friend, comrade," also a form of address, 1837, American English (first attested in the phrase adios, Amigo), from Spanish amigo, literally "friend," from Latin amicus "friend," related to amare "to love" (see Amy).
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complicity (n.)

"the state of being an accomplice, partnership in wrongdoing or an objectionable act," 1650s, from French complicité, from Old French complice "accomplice, comrade, companion" (14c.), from Late Latin complicem, accusative of complex "partner, confederate," from Latin complicare "to fold together," from com "with, together" (see com-) + plicare "to fold, weave" (from PIE root *plek- "to plait"). Compare accomplice.

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pal (n.)

"partner, mate, chum," slang, 1680s, said to be from Romany (English Gypsy) pal "brother, comrade," a variant of continental Romany pral, plal, phral, which are probably from Sanskrit bhrata "brother" (from PIE root *bhrater- "brother"). Colloquial extended form palsy-walsy is attested from 1930. Pally (adj.) is attested by 1895.

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fere (n.)

"companion" (obsolete), from Middle English fere, a shortening of Old English gefera "associate, comrade, fellow-disciple; wife, man, servant," from Proto-Germanic *forjanan, from the causative of *faranan (source of Old English faran "to go, travel"), from PIE root *per- (2) "to lead, pass over." Literally "one who goes with another." Compare German Gefährte "companion," from the same root; also, from causative *forjan-, Old High German fuoren. "to lead," modern German Fuhrer.

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make (n.)

"match, mate, companion" (now archaic or dialectal), from Old English gemaca "mate, equal; one of a pair, comrade; consort, husband, wife," from Proto-Germanic *gamakon- (source also of Old Saxon gimaco, Old High German gimahho, Old Norse maki), related to Old English gemæcc "well-matched, suitable," macian "to make" (see make (v.)). Meaning "manner in which something is made, form, shape, design, construction" is from c. 1300. Slang phrase on the make "intent on profit or advancement" is from 1869.

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participation (n.)

"act or fact of sharing or partaking in common with another or others; act or state of receiving or having a part of something," late 14c., participacioun, from Old French participacion (13c.) and directly from Late Latin participationem (nominative participatio) "partaking," noun of action from past-participle stem of Latin participare "participate in, share in, partake of; to make partaker, to share, impart," from particeps (genitive participis) "partaker, comrade, fellow soldier," also, as an adjective, "sharing, partaking," from pars (genitive partis) "a part, piece, a division" (from PIE root *pere- (2) "to grant, allot") + -cip-, weak form of stem of capere "to take," from PIE root *kap- "to grasp." Related: Participational "involving or requiring participation" (1952).

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