ma·nip·u·la·tion 
(m
ə-n
ĭp
′y
ə-l
āsh
ən)
n.1. a. The act or practice of manipulating.
b. The state of being manipulated.
2. Shrewd or devious management, especially for one's own advantage.
[French, from Spanish manipulación, manipulation (originally of implements and substances in alchemical procedures), from Latin manipulus, sheaf, handful; see MANIPLE.]