undo

1 to deprive of courage or confidence the sudden shriek undid the campers Synonyms of undo demoralize, emasculate, paralyze, unnerve, unman, unstringWords Related to undo debilitate, enervate, enfeeble, neuter, weaken; prostrate, sap, soften, tire, waste; frighten, intimidate, psych (out), scare, terrify, terrorize; daunt, discourage, dishearten, dismay, dispirit; craze, derange, madden, unbalance, unhinge; discompose, disquiet, disturb, faze, perturb, unsettle, upset, weird outNear Antonyms of undo fortify, strengthen; embolden, encourage, heartenAntonyms of undo nerve

2 to disengage the knotted parts of undo a tangled shoelace Synonyms of undo unbind, untie, unfasten, unlashWords Related to undo unbraid, unlace; disentangle, ravel, unravel, unsnarl, untangle, unwind; loose, loosenNear Antonyms of undo braid, interlace, interweave, lace, wind; entangle, snarl, tangleAntonyms of undo bind, fasten, knot, lash, tie

3 to trouble the mind of; to make uneasy the mere mention of the home invasion still had the power to undo her Synonyms of undo agitate, ail, alarm (also alarum), bother, concern, derail, discomfort, discompose, dismay, disquiet, distemper, distract, distress, exercise, flurry, frazzle, freak (out), fuss, hagride, perturb, disturb, unhinge, unsettle, upset, weird out, worryWords Related to undo aggravate, anger, annoy, bug, chafe, chivy (or chivvy), exasperate, fret, gall, get, grate, harass, harry, irk, irritate, nettle, peeve, pester, pique, put off, put out, rile, vex; bedevil, haunt, plague; abash, confound, confuse, discomfit, disconcert, discountenance, embarrass, faze, fluster, jar, mortify, nonplus, rattle, shake up; daunt, demoralize, discourage, dishearten, dispirit, unnerveNear Antonyms of undo allay, alleviate, assuage; appease, conciliate, mollify, pacify, placate, propitiateAntonyms of undo calm, compose, quiet, settle, soothe, tranquilize (also tranquillize)