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Webster 1828 Edition

ppr.

Delivering up treacherously; violating confidence; disclosing contrary to intention; exposing; discovering.

betraying

betraying ‎(plural betrayings)

betrayal
- Sir Walter Raleigh
  Oh, by what plots, by what forswearings, betrayings, oppressions, imprisonments, tortures, poisonings, and under what reasons of state and politic subtilty, have these forenamed kings […] pulled the vengeance of God upon themselves […]