1. to lie face down; to lie flat (on one's stomach); to fall prostrate

2. to bend down (in submission); to bow down; to prostrate oneself

3. to (crouch) and hide (behind); to conceal oneself

4. to lie down (and sleep); to go to bed (with an illness) (usu. as 臥す)

5. to lay (something) face down; to place upside down; to turn over (face down)

6. to conceal; to hide; to keep secret