A Crook

1. A bend; turn; curve; curvature; a flexure.
2. A bending of the knee; a genuflection.
3. A bent or curved part; a curving piece or portion (of anything).
4. (obsolete) A lock or curl of hair.
5. (obsolete) A gibbet.
6. (obsolete) A support beam consisting of a post with a cross-beam resting upon it; a bracket or truss consisting of a vertical piece, a horizontal piece, and a strut.
7. A shepherd's crook; a staff with a semi-circular bend ("hook") at one end used by shepherds.
8. A bishop's staff of office.
9. An artifice; a trick; a contrivance.
10. A person who steals, lies, cheats or does other dishonest or illegal things; a criminal.
11. A pothook.
12. (music) A small tube, usually curved, applied to a trumpet, horn, etc., to change its pitch or key.

(criminal): criminal