to disturb or disquiet greatly in mind; agitate.

to throw into great disorder; derange.

Astronomy . to cause perturbation in the orbit of (a celestial body).

verb

calm , please , soothe

verb

agitate , alarm , annoy , bewilder , bother , bug * , confound , confuse , disarrange , discompose , disconcert , discountenance , dismay , disorder , disquiet , disturb , flurry , fluster , irritate , make a scene , make waves , muddle , needle , perplex , pester , ruffle , stir up , trouble , vex , worrynotes:disturb is based on latin turba \'tumult\' and disturb applies better to physical agitation and perturb to mental agitation , distract , rock , shake , toss , unsettle , upset , distress , excite , worry