Etymology
Advertisement

betrayer (n.)

1520s, agent noun from betray (v.).

updated on October 26, 2012

Advertisement
Advertisement
Definitions of betrayer from WordNet

betrayer (n.)
one who reveals confidential information in return for money;
Synonyms: informer / rat / squealer / blabber
betrayer (n.)
a person who says one thing and does another;
Synonyms: double-crosser / double-dealer / two-timer / traitor
Etymologies are not definitions. From wordnet.princeton.edu, not affiliated with etymonline.