serene

/səˈɹiːn/adjective

Quietly calm and untroubled; free from stress or disturbance.

Example sentence

“The lake looked serene in the early morning light.”

Describes scenes and faces: a serene lake, a serene smile. The noun is 'serenity', familiar from the Serenity Prayer.

Related words

tranquilPeaceful and quiet, with nothing moving or making noise.optimisticHopeful and confident that things will go well.peacefulFree from war, conflict, or disturbance.gleefulFull of open, excited delight, often at a victory or someone else's misfortune.satisfiedPleased because something has met your needs or expectations.merryCheerful, lively, and full of fun.