mid-15c., Scottish, "postpone, defer," from 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," from PIE root *sed- (1) "to sit." Meaning "displace, replace" first recorded 1640s. Related: Superseded; superseding.
Proto-Indo-European root meaning "to sit."
It forms all or part of: assess; assiduous; assiento; assize; banshee; beset; cathedra; cathedral; chair; cosset; dissident; dodecahedron; Eisteddfod; ephedra; ephedrine; ersatz; icosahedron; inset; insidious; nest; niche; nick (n.) "notch, groove, slit;" nidicolous; nidification; nidus; obsess; octahedron; piezo-; piezoelectric; polyhedron; possess; preside; reside; saddle; sanhedrim; seance; seat; sedan; sedate; (adj.) "calm, quiet;" sedative; sedentary; sederunt; sediment; see (n.) "throne of a bishop, archbishop, or pope;" sessile; session; set (v.); sett; settle (n.); settle (v.); siege; sit; sitz-bath; sitzkrieg; size; soil (n.1) "earth, dirt;" Somerset; soot; subside; subsidy; supersede; surcease; tanist; tetrahedron; Upanishad.
It is the hypothetical source of/evidence for its existence is provided by: Sanskrit a-sadat "sat down," sidati "sits," nidah "resting place, nest;" Old Persian hadis "abode;" Greek ezesthai "to sit," hedra "seat, chair, face of a geometric solid;" Latin sedere "to sit; occupy an official seat, preside; sit still, remain; be fixed or settled," nidus "nest;" Old Irish suide "seat, sitting," net "nest;" Welsh sedd "seat," eistedd "sitting," nyth "nest;" Old Church Slavonic sežda, sedeti "to sit," sedlo "saddle," gnezdo "nest;" Lithuanian sėdėti "to sit;" Russian sad "garden," Lithuanian sodinti "to plant;" Gothic sitan, Old English sittan "to sit."
Middle English overriden, from Old English oferridan "to ride across, ride through or over," from ofer "over" (see over) + ridan "to ride" (see ride (v.)). Originally literal, of cavalry, etc. Figurative meaning "to set aside arrogantly" is by 1827, from the notion of "to trample down," hence "supersede." The mechanical sense "to suspend automatic operation" is attested from 1946. As a noun in the sense "act or process of suspending automatic operation," from 1946. Related: Overrode; overriding; overridden.
And þanne þeze Frenschmen come prikkyng doun as þei wolde haue ouyr-rydyn alle oure meyne; but God and our archers made hem sone to stomble. [Layamon, from the description of the Battle of Agincourt in "The Brut, or The Chronicles of England"]