"to delay, put off, postpone," late 14c., differren, deferren, from Old French diferer (14c.) and directly from Latin differre "carry apart, scatter, disperse;" also "be different, differ;" also "defer, put off, postpone," from assimilated form of dis- "away from" (see dis-) + ferre "to bear, carry," from PIE root *bher- (1) "to carry." Etymologically identical with differ; their spelling and pronunciation were differentiated from 15c., perhaps partly by association of this word with delay. Related: Deferred; deferring.
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Harper, D. (n.d.). Etymology of deferred. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/deferred