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Webster 1828 Edition

ppr.

Putting on a bridle; restraining;curbing.

Holding up the head, and drawing in the chin.

The bridling frown of wrinkles brows.

bridling

bridling ‎(plural bridlings)

The act of one who bridles.
- Maria Edgeworth
  […] with infinite difficulty in bringing herself to speak on such a subject, after inconceivable bridlings of the head, and contortions of every muscle of her neck, she insinuated to him her fears […]