betray

v

1. inform against, Sl. blow the whistle on, Sl. rat on; knife or stab in the back, Sl. do [s.o.] dirt; play Judas, give the Judas kiss to, Inf. sell out, deliver up, Inf. sell [s.o.] down the river; Inf. double cross, Sl. two-time; break faith with, let down, disappoint, break one's promise.

2. reveal, divulge, let the cat out of the bag, give away, blab, blurt out, let slip, disclose, Archaic. discover; violate a confidence, reveal the secrets of, whisper about; exhibit, display, vent, show, manifest, evince; unmask, uncover, unfold, bare, expose, bring to light, lay bare.

3. mislead, delude, dupe, fool, befool; hoodwink, bamboozle, humbug, take in, pull the wool over [s.o.'s] eyes; deceive, beguile, cheat, gull, cozen, outwit, circumvent; trap, ensnare.

4.(all usu. in reference to sexual relations) seduce, lead astray, entice, lure, trick; corrupt, pervert, debauch; violate, Euph. take advantage of, Euph. have one's way with, ravish, deflower, Obs. devirgin-ate, Obs. constuprate, Obs. stuprate; defile, molest, outrage, desecrate.

5. abandon, walk out on, forsake, desert; leave behind, throw over, jilt, run out on, Inf. leave flat, turn one's back on, Sl. give the deep six; ignore, cut off, neglect, ostracize; leave, depart, quit, go away from, vacate.