SWEAR

v. 1 depose, aver, asseverate, declare, insist, assert, solemnly affirm or state, testify, promise, take an oath, undertake, vow, avow, vouchsafe, warrant, pledge, give one's word, agree He swore he had not done any such thing 2 curse, blaspheme, imprecate, use profanity, utter profanities, execrate, Colloq cuss Priscilla stopped her ears at the men's swearing 3 swear by. trust (in), believe in, rely on, have confidence in, count on The colonel swears by the same old fountain-pen he has used for years and will use no other 4 swear off. forswear, renounce, abjure, go off, forgo, shun, avoid, give up, eschew, forsake, throw over Brian tells me he's sworn off alcohol for a while