Tranquil Verb Synonyms
calm, serene, placid, quiet, peaceful, still, smooth, unagitated, halcyon, relaxed, unruffled, sedate, steady, regular, even, dispassionate, self-possessed, cool, self-controlled, cool-headed, unexcited, undisturbed, untroubled, unperturbed
He often thought back to the tranquil, sultry summer days of his youth. How can Eleanor be so tranquil when everything about her is so chaotic.
Search Google for Tranquil: