Perturb
Part of speech: verb
Definition: To disturb; to bother or unsettle. To slightly modify the motion of an object. To modify the motion of a body by exerting a gravitational force. To modify slightly, such as an equation or value.
Derange
Part of speech: verb
Definition: to cause someone to go insane (usually used in the passive, see deranged)to cause disorder in something, to distort it from its ideal stateto disrupt somebody's plans, to inconvenience someone