verb, -tled, -tling.| 1. | to alter from a settled state; cause to be no longer firmly fixed or established; render unstable; disturb: Violence unsettled the government. |
| 2. | to shake or weaken (beliefs, feelings, etc.); cause doubt or uncertainty about: doubts unsettling his religious convictions. |
| 3. | to vex or agitate the mind or emotions of; upset; discompose: The quarrel unsettled her. |
| 4. | to become unfixed or disordered. |