peep

(noun) the short weak cry of a young bird. Synonyms: cheep.

(noun) a secret look. Synonyms: peek.

(verb) look furtively. Example: "He peeped at the woman through the window."

(verb) cause to appear. Example: "He peeped his head through the window."

(verb) make high-pitched sounds. Synonyms: cheep, chirp, chirrup. Example: "The birds were chirping in the bushes."

(verb) speak in a hesitant and high-pitched tone of voice.

(verb) appear as though from hiding. Example: "The new moon peeped through the tree tops."