to peep is a form of:

Peep



ENGLISH MEANING
noun
1.
The cry of a young chicken; a chirp.
2.
First outlook or appearance.
3.
A sly look; a look as through a crevice, or from a place of concealment.
4.
Any small sandpiper, as the least sandpiper (Trigna minutilla).
5.
The European meadow pipit (Anthus pratensis).
verb
1.
(INTRANSITIVE) To cry, as a chicken hatching or newly hatched; to chirp; to cheep.
2.
(INTRANSITIVE) To begin to appear; to look forth from concealment; to make the first appearance.
3.
(INTRANSITIVE) To look cautiously or slyly; to peer, as through a crevice; to pry.