abjure
verb
I have abjured all stimulants:
renounce, relinquish, reject, dispense with, forgo, forswear, disavow, abandon, deny, gainsay, disclaim, repudiate, give up, spurn, abnegate, wash one's hands of, drop, do away with;
eschew, abstain from, refrain from;
informal kick, jack in, pack in;
Law disaffirm;
archaic forsake.