The Collaborative International Dictionary
Perpend \Per*pend"\, v. t. [L. perpendere, perpensum; per +
pendere to weight.]
To weight carefully in the mind. [R.] ``Perpend my words.''
--Shak.
Perpend \Per*pend"\, v. i.
To attend; to be attentive. [R.]
--Shak.
Wiktionary
n. 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 between bricks or blocks in a horizontal course vb. (context archaic English) To ponder, consider.
Wikipedia
Usage examples of "perpend".
He retired to the inn at Starr to write out his notes and perpend the situation.
In lonely lighthouses beyond the Nore, In English country houses crammed with Jews, Men still will study, spell, perpend and pore And read the Illustrated London News.
He was filled with horrid forebodings--a sense of perpending intimacy with things such as no gentleman had dealings with.
As for thy last perpended doubt, to wit, how thou shouldst deal with me, banish it utterly from thy thoughts.