"So I do, madonna; but to read his right wits is to read thus: therefore perpend, my princess, and give ear.
-- William Shakespeare, Twelfth night, or, What you will
Let us each ponder the probity of global harmony. Might we perpend that tranquility can be more than a theory? When we cast a ballot, let us consider imminent combat and intentional communication. Which would you choose? Heed the call. Our children's future is in our hands.
-- Betsy Angert, Bethink.com: Clinton, Obama, Citizens; Our Children's Future is in Your Hands
While perpend as a noun means "a large stone passing through the entire thickness of a wall" (related to perpendicular), the verb form not only possesses a different pronunciation but also emerges independently from the Latin root perpendere, "to weigh carefully."