Compounds of 窺

• 窺う
  (v5u,vt) (1) to peep (through)
  to peek
  to examine (esp. covertly)
  (2) to await (one's chance)
  (3) (usu. used passively) to guess
  to infer
  to gather
  to surmise
• 窺く
  (v5k,vt) (1) to peek (though a keyhole, gap, etc.)
  (2) to look down into (a ravine, etc.)
  (3) to peek into (a shop, bookstore, etc.)
  (4) to sneak a look at
  to take a quick look at
  (5) to peep (through a telescope, microscope, etc.)
  (v5k,vi) (6) to stick out (a scarf from a collar, etc.)
  to peek through (sky though a forest canopy, etc.)
  (7) (arch) to face
• 窺知
  (n,vs) perception
  understanding
• 窺い探る
  (v5r) to spy out
• 窺い知る
  (v5r,vt) to perceive
  to understand
• 隙を窺う
  (exp) to watch for an unguarded moment
• 窺いがいしる
  (v5r,vt) to perceive
  to understand