per·turb
1. To disturb greatly; make uneasy or anxious.
2. To throw into great confusion.
3. Physics & Astronomy. To cause perturbation, as of a celestial orbit.
[Middle English perturben, from Old French perturber, from Latin perturbre : per-, per- + turbre, to throw into disorder (from turba, confusion, perhaps from Greek turb).]per·turba·ble adj.
perturbed
adj : thrown into a state of agitated confusion; (`rattled' is an informal term) [syn: flustered, hot and bothered(p), rattled]
Had to look up the word...my WA and Clemson education never taught me that word...