godan ~く verb / transitive:

• to peek (though 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.)

godan ~く verb / intransitive verb:

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

godan ~く verb / transitive:

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

godan ~く verb / intransitive verb:

• to face - esp. 臨く - archaism ➜ 臨む