Etymology From Middle English comper, from Middle French comper, from Latin compater, compatrem. Doublet of compere as well as compadre and goombah. Influenced by folk-etymological analysis as com- + peer.
1
Obsolete The equal or peer of someone else; a close companion or associate.
And him thus answer'd soon his bold compeer.1667, John Milton, “Book I”, in Paradise Lost. […], London: […] [Samuel Simmons], and are to be sold by Peter Parker […]; [a]nd by Robert Boulter […]; [a]nd Matthias Walker, […], →OCLC; republished as Paradise Lost in Ten Books: […], London: Basil Montagu Pickering […], 1873, →OCLC:
She had fallen into the common error of supposing that the author must personify his works, and that his conversation must be copy and compeer of his writings.1831, L[etitia] E[lizabeth] L[andon], Romance and Reality. […], volume I, London: Henry Colburn and Richard Bentley, […], →OCLC, pages 155–156:
compeer
verb
Etymology From Middle English comper, from Middle French comper, from Latin compater, compatrem. Doublet of compere as well as compadre and goombah. Influenced by folk-etymological analysis as com- + peer.
1
To be equal with; to match.
In my rights, / By me invested, he compeers the best.c. 1603–1606, William Shakespeare, “The Tragedie of King Lear”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, →OCLC, [Act V, scene iii]: