- Free from emotional or mental disturbance.
- Calm; without motion or sound.
- 1921, Douglas Wilson Johnson, Battlefields of the World War, Western and Southern Fronts: A Study in Military Geography, page 262:
- […] that the streams which did form were clear and tranquil because fed by perennial springs from the underground supply; and that in their tranquil waters extensive peat bogs formed.
- (free from emotional disturbance): calm, peaceful, serene, steady
- (calm; without motion or sound): peaceful
- (free from emotional disturbance): agitated
free from emotional disturbance
calm; without motion or sound
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