To reduce to nothing, to destroy, to eradicate.
To render null and void; to abrogate.
To react with antimatter, producing gamma radiation and (for higher-mass reactants, especially composite particles such as protons) lighter particles (such as pions, muons, and neutrinos).
To do away with.
To settle (a debt) by paying the outstanding amount.
To settle the affairs of (a company), by using its assets to pay its debts.
To kill.
To convert (assets) into cash; to redeem.
To determine by agreement or by litigation the precise amount of (indebtedness); to make the amount of (a debt) clear and certain.