(a.) Not ruffled or agitated; smooth; calm; tranquil; quiet.

accordant alike at rest automatic balanced calm cloistered collected composed consistent consonant constant continuous cool correspondent downy dwindling ebbing equable equal even even-tenored flat glabrate glabrescent glabrous halcyon homogeneous hushed immutable impassive imperturbable invariable isolated leiotrichous level measured mechanical methodic moldering monolithic nonchalant of a piece ordered orderly pacific peaceable peaceful persistent placid plane quiescent quiet regular reposeful reposing restful resting robotlike secluded sequestered sequestrated sheltered smooth smooth-shaven smooth-textured stable steadfast steady still still as death stillish stilly stoic stolid suave subsiding systematic tranquil unaffected unagitated unanimated unbroken unchangeable unchanged unchanging undeviating undifferentiated undisturbed undiversified unexcited unflappable unflustered uniform unimpassioned unimpressed uninspired unmoved unperturbed unrough unroughened unstirred unstirring unstruck untouched untroubled unvaried unvarying waning