escort n.

word-forming element, in English meaning usually "out of, from," but also "upwards, completely, deprive of, without," and "former;" from Latin ex "out of, from within; from which time, since; according to; in regard to," from PIE *eghs "out" (source also of Gaulish ex-, Old Irish ess-, Old Church Slavonic izu, Russian iz). In some cases also from Greek cognate ex, ek. PIE *eghs had comparative form *eks-tero and superlative *eks-t(e)r-emo-. Often reduced to e- before -b-, -d-, -g-, consonantal -i-, -l-, -m-, -n-, -v- (as in elude, emerge, evaporate, etc.).

mid-14c., "to set (someone) right by punishing for a fault or error, to discipline;" late 14c., of texts, "to bring into accordance with a standard or original," from Latin correctus, past participle of corrigere "to put straight, attempt to make (a crooked thing) straight, reduce to order, set right;" in transferred use, "to reform, amend," especially of speech or writing, from assimilated form of com-, here perhaps an intensive prefix (see com-), + regere "to lead straight, rule" (from PIE root *reg- "move in a straight line," with derivatives meaning "to direct in a straight line," thus "to lead, rule").

Meaning "to remove or counteract the operation of" is from late 14c. Related: Corrected; correcting.