n. 25B6; verb
they swore to marry each other : PROMISE, vow, pledge, give one's word, take an oath, undertake, guarantee; Law depose; formal aver.
she swore she would never go back : INSIST, avow, pronounce, declare, proclaim, assert, profess, maintain, contend, emphasize, stress; formal aver.
Kate spilled wine and swore : CURSE, blaspheme, utter profanities, utter oaths, use bad language, take the Lord's name in vain; informal cuss, eff and blind; archaic execrate.
25A0; swear by (informal) EXPRESS CONFIDENCE IN, have faith in, trust, believe in; set store by, value; informal rate.
25A0; swear off (informal) RENOUNCE, forswear, forgo, abstain from, go without, shun, avoid, eschew, steer clear of; give up, dispense with, stop, discontinue, drop; informal kick, quit; Brit. informal jack in.