Perturb

Per*turb" (?), v. t. [L. perturbare, perturbatum; per + turbare to disturb, fr. turba a disorder: cf. OF. perturber. See Per-, and Turbid.] 1. To disturb; to agitate; to vex; to trouble; to disquiet.

Ye that . . . perturb so my feast with crying.
Chaucer.

2. To disorder; to confuse. [R.] Sir T. Browne.