treacherously russian

• коварно

  insidiously, treacherously, perfidiously, craftily, maliciously

Examples

• И сказа́л я: беда́ мне, беда́ мне! увы мне! злоде́и злоде́йствуют, и злоде́йствуют злоде́и злоде́йски.And I said, My leanness, my leanness, woe unto me! The treacherous have dealt treacherously; yea, the treacherous have dealt very treacherously.