play false

abandon deceive forsake mislead seduce

bluff cross delude desert finger jilt knife trick

be unfaithful bite the hand that feeds you blow the whistle break faith break promise break trust break with commit treason deliver up double-cross go back on inform against inform on let down play Judas sell down the river sell out stab in the back take in turn in turn informer turn state's evidence walk out on

aid assist help stay

be faithful be loyal be quiet defend hide keep secret protect support

betray double-cross rat sell one's soul stab in the back

beguile break faith bunk cross deceive deliver up delude disappoint double-cross fail four-flush give away give up mislead rat on sell down the river stab in the back surrender take in violate

guard protect