disorient

from The American Heritage® Dictionary of the English Language, 5th Edition.

• transitive verb To cause (a person, for example) to experience disorientation.

from The Century Dictionary.

• To turn from the east; throw out of direction with respect to the east.
• To confuse as to direction in general; cause to lose one's bearings.
• Figuratively, to cause to lose the knowledge of the direction in which the truth lies; cause to lose one's reckoning with respect to the truth: the east being taken metaphorically for the truth.

from the GNU version of the Collaborative International Dictionary of English.

• transitive verb rare To turn away from the east; to confuse as to which way is east; to cause to lose one's bearings.
• transitive verb to cause (a person) to lose one's sense of direction; to cause to lose one's bearings or way.
• transitive verb (Psychiatry) to cause one to lose one's sense of time or place, or of one's own personal identity.
• transitive verb to confuse (a person) by changing or removing something which has served as a standard or guide to action.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb To cause to lose orientation or direction.
• verb To confuse or befuddle.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• verb cause to be lost or disoriented