Compounds of 空く

• 空く
  (v5k,vi) (1) to open (e.g. doors)
  (2) to open (e.g. business, etc.)
  (3) to be empty
  (4) to be vacant
  to be available
  to be free
  (5) to be open (e.g. neckline, etc.)
  (6) to have been opened (of one's eyes, mouth, etc.)
  (7) to come to an end
  (v5k,vt) (8) to open (one's eyes, mouth, etc.)
  (v5k,vi) (9) to have a hole
  to form a gap
  to have an interval (between events)
  (P)
• 空く
  (v5k,vi) (1) to become less crowded
  to thin out
  to get empty
  (2) to be hungry
  (P)
• 手が空く
  (exp) to be free
  to be available
• 手が空く
  (exp) to be free
  to be available
• 腹が空く
  (exp,v5k) to become hungry
  to get an empty stomach
• お腹が空く
  (exp,v5k) to become hungry
  to get an empty stomach
• 時間が空く
  (exp,v5k) to have time free
  to have time to spare