- - Least ruffled
- - Least disturbed
- - Least choppy, as seas
- - Rattled the least
- - Least likely to flip out
- - Least shaken up
- - Least wavy
- - Least rocky
- - Least rattled
- - Least perturbed
- - Most sedate
- - Most tranquil
- - Most composed
- - Most placid.
- - Most serene
- - Still the most
- - Poised to the max
- - Serene to the max
- - Most cool
- - Most self-possessed.
- - Most undisturbed.
- - Most relaxed
- - Serene
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