unsettle
un.set.tle \.*n-'set-*l, '*n-\ vt 1: to loosen or move from a settled state or condition : make unstable :: DISTURB, DISORDER 2: to perturb or agitate mentally or emotionally : DISCOMPOSE : to become unsettled
Webster's English Dictionaryun.set.tle \.*n-'set-*l, '*n-\ vt 1: to loosen or move from a settled state or condition : make unstable :: DISTURB, DISORDER 2: to perturb or agitate mentally or emotionally : DISCOMPOSE : to become unsettled