assert:
conceal,
hide,
abandon,
desert,
leave,
surrender,
reject,
question,
deny.
assist:
halt,
check,
delay,
hinder,
stop,
handicap,
block,
impede,
injure,
undermine,
obstruct,
thwart,
frustrate,
prevent,
discourage,
hurt.
champion:
oppose,
be against,
forsake.
contest:
give up,
go along,
allow,
resign,
agree.
defend:
disapprove,
renounce,
punish,
ignore,
relinquish,
neglect,
sentence,
attack,
condemn,
protest,
blame,
accuse,
quit.
endorse:
criticize,
invalidate,
censure,
dissuade,
refuse, Unauthorize,
veto,
repel,
disagree.
guarantee:
break,
repudiate,
disprove,
refute,
harm,
contradict,
let go.
justify:
convict,
charge,
damn,
incriminate.
reinforce:
decrease,
take away,
soften,
lessen,
weaken,
melt,
diminish,
liquefy,
play down,
let down,
reduce,
subtract.
speak out/speak up:
be quiet,
shut up.
support:
release.
testify:
discredit.
vouch:
disavow,
disclaim.
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