I then put myself in the most supplicating posture, and spoke in the humblest accent, but received no answer.
All I ventured was to raise mine eyes towards the sun, and place my hands together in a supplicating posture, and to speak some words in a humble melancholy tone, suitable to the condition I then was in: for I apprehended every moment that he would dash me against the ground, as we usually do any little hateful animal, which we have a mind to destroy.
There are no more uses of "supplicate" in the book.
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He supplicated the King for forgiveness
The woman walked past him, up the steps, onto the porch, into the house, and the man bowed his head as if in prayer, then lifted his head as if in supplication.