のぞく

to peek (through a keyhole, gap, etc.)

to look down into (a ravine, etc.)

to peek into (a shop, bookstore, etc.)

to sneak a look at; to take a quick look at

to peep (through a telescope, microscope, etc.)

to stick out (a scarf from a collar, etc.); to peek through (sky through a forest canopy, etc.)

to examine (an expression); to study (a face)