How to Say "tranquil" in Spanish
The Spanish word for “tranquil” is “quieto” — B1 level.
English → SpanishB1
AdjectiveB1
describing deep serenity

Examples
Después de la tormenta, el mar estaba quieto y azul.
After the storm, the sea was calm and blue.
Ella tiene una naturaleza quieta y reflexiva.
She has a quiet (calm) and thoughtful nature.
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