Synonyms:
placid, quiet, still, tranquil, smooth, unruffled
Meaning: (of a body of water) free from disturbance by heavy waves; "a ribbon of sand between the angry sea and the placid bay"; "the quiet waters of a lagoon"; "a lake of tranquil blue water reflecting a tranquil blue sky"; "a smooth channel crossing"; "scarcely a ripple on the still water"; "unruffled water"
Synonyms:
unflurried, unflustered, unperturbed, unruffled
Meaning: free from emotional agitation or nervous tension; "the waiters were unflurried and good natured"; "with contented mind and unruffled spirit"- Anthony Trollope
Usage examples
All of the region about Winnipeg, in the Red River country, covering great areas of hundreds of miles in extent, is a level plain only lacking the coloring to give to one passing through it the effect of a great unruffled sea.
It was the aged minister leading my mother the last path of all. The book was in his hand, and his form was tall and stately, and his step so slow, that the white hair fell unruffled, while the grand words on his lips called majesty into his gaze.