pucker
verb (used with or without object)
to draw or gather into wrinkles or irregular folds, as material or a part of the face; constrict.
Used to describe an action that was ongoing continuously in the past up until another past event interrupted it.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Nan, who had been puckering up her face to cry, smiled instantly; then she scrambled to her feet, and flung her little fat arms round Annie’s neck.
From A World of Girls The Story of a School by Meade, L. T.