bind oneself

STRONGEST

assure ensure insure maintain protect prove secure support

STRONG

affirm angel attest aver back bankroll certify confirm cosign endorse evidence evince grubstake guaranty juice mortgage reassure stake swear testify wager warrant witness

WEAK

answer for be surety for get behind give bond make bail make certain make sure pick up the check pick up the tab sign for stand behind stand up for vouch for

STRONGEST

harm hurt injure let go neglect

STRONG

contradict deny discourage disprove invalidate oppose refute reject repudiate veto

WEAK

break