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Webster 1828 Edition

adv.

With a cant.

cantingly ‎(comparative more cantingly, superlative most cantingly)

In a canting manner; with jargon or religious affectation.
- 1840, The New Monthly Magazine (page 429)
  We have seen and heard the sneers and sarcasms with which poor Frank's unobtrusive attempts to moralize, not tediously, boringly, or cantingly, have been received by Sir George and his eldest son.