partner (v.) Look up partner at Dictionary.com
1610s, transitive, "to make a partner," from partner (n.). Intransitive sense from 1961. Related: Partnered; partnering.
partner (n.) Look up partner at Dictionary.com
c. 1300, 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"). Form in English influenced by part (n.). The word also may represent Old French part tenour "part holder."