Peep

pío

(quiet sound, particularly one from a baby bird)

susurro

(feeble utterance or complaint)

espiar

(to look)

husmear

(to look)

piar

(make a noise like a baby bird)

pishpar

(to look forth from concealment)

pispar

(to look forth from concealment)

susurrar

(speak briefly with a quiet voice)