the GNU version of the Collaborative International Dictionary of English
v. to cause to be confused; confuse emotionally; to dismay.
The Century Dictionary and Cyclopedia
To throw into confusion; dismay; terrify.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
v. fill with anxiety, dread, dismay, or confusion
Word Usage
"Thus there could be some back and fill in consumer sell-through the next month that will further consternate and confuse as to the underling, still upward trend."