abandon
abjure
abort
belay
break
break off
break the habit
cancel
cease
come off
cut it out
cut out
desist
disarrange
disjoin
disuse
drop
drop it
end
forswear
give
give over
give up
halt
have done with
hold
interrupt
kick
knock it off
lay off
leave off
let go
nol-pros
not pursue with
part
put behind one
quit
refrain
relinquish
renounce
resign
scrub
shake
stay
stop
surcease
suspend
swear off
take the pledge
terminate
call it a day
call it quits
cheese
close off
knock off
pull the plug
retire
shut off
sign off
withdraw
discontinued
discontinues
discontinuing
continue