One of the ropes writhed uneasily, and suddenly Lenina saw that they were snakes.
Slowly, the boy began to walk round the writhing heap of snakes.
Drawn by the fascination of the horror of pain and, from within, impelled by that habit of cooperation, that desire for unanimity and atonement, which their conditioning had so ineradicably implanted in them, they began to mime the frenzy of his gestures, striking at one another as the Savage struck at his own rebellious flesh, or at that plump incarnation of turpitude writhing in the heather at his feet.
There are no more uses of "writhe" in the book.
Show samples from other sources
The patient writhed in pain.
She writhed on the sidewalk begging that someone call an ambulance.