perpend

Etymology 1

Borrowed from Latin perpendere, from per- + pendere (“to weigh”).

verb

1. (archaic) To ponder, consider.

Etymology 2

From Middle French parpain, see etymology of French parpaing.

noun

1. A brick or stone that has its longest dimension perpendicular to the face of a wall, especially one that extends through the wall's entire thickness.
2. A vertical joint (usually mortar) between bricks or blocks in a horizontal course.