PEEP

pep (tsphaph; the King James Version Isaiah 8:19; 10:14 (the Revised Version (British and American) "chirp")): In 10:14, the word describes the sound made by a nestling bird; in 8:19, the changed (ventriloquistic?) voice of necromancers uttering sounds that purported to come from the feeble dead. The modern use of "peep" = "look" is found in Sirach 21:23, as the translation of parakupto: "A foolish man peepeth in from the door of another man's house."

From the International Standard Bible Encyclopedia
Edited by James Orr, published in 1939 by Wm. B. Eerdmans Publishing Co.