tranquil
adjective
1. (of a body of water) free from disturbance by heavy waves
- a lake of tranquil blue water reflecting a tranquil blue sky
Similar word(s): calm, placid, quiet, smooth, still, unruffled
2. not agitated; without losing self-possession
- she became more tranquil
- tranquil life in the country
Similar word(s): composed, calm, serene, unagitated