supersede (v.) Look up supersede at Dictionary.com
mid-15c., Scottish, "postpone, defer," from Middle French superceder "desist, delay, defer," from Latin supersedere literally "sit on top of;" also, with ablative, "stay clear of, abstain from, forbear, refrain from," from super "above" (see super-) + sedere "to sit" (see sedentary). Meaning "displace, replace" first recorded 1640s. Related: Superseded; superseding.