betrayer
Betrayer (noun) means a person who betrays someone, or who gives away secrets to those who shouldn't have them; an informer. Example: “The film centers on a wartime betrayer who sold out his own resistance cell.”
How to use betrayer
Learner’s notesIn plain EnglishSomeone who breaks trust by betraying another person.
Word forms
- Plural
- betrayers
Fill the gap
Can you complete this real example?
The film centers on a wartime _____ who sold out his own resistance cell.
Etymology
Simply betray plus the agent suffix -er, "one who does" — the same pattern as "teacher" from "teach."