to put an end to (a law, an old custom, war etc.)

away with or put an end to

to cause a person to end a pregnancy before the fetus is fully developed

stop or cancel something

to destroy (a group, community) completely

destroy completely

to cause (a marriage agreements, a law etc) to exist no longer

void an agreement

an offer (of a price) made in reply to an earlier offer

take back; cancel

to say that (something) is not true

disagree, renounce, decline

to break (something) to pieces; make (something) useless; put an end to (hopes, a career etc)

demolish, devastate

to rub or scrape out (something)

remove; rub out

to prevent (a person) from doing something; to prevent (plans) from being carried out

thwart, disappoint

to make (a written agreement, guarantee etc) not valid

render null and void

to take away the effect or special quality of (something) by using something with an opposite effect or quality

counteract

to fall over

flip over

to refuse to agree with or accept (an opinion, decision, wish, claim etc); to ignore (an instruction) because of special conditions

supersede

to decide against (a person, decision etc) (especially by using one's higher authority)

repeal

to travel over or beyond (a mark or limit)

omit, avoid

to travel over or beyond (a mark or limit)

omit, avoid

(to cause something) to turn over; upset

flip over

to give up (an opinion, a belief) publicly; admit (a statement) was false

take back something said

to cancel, end (a decree, consent, permission etc)

take back; cancel

turn off; cancel

turn off; cancel