Calm, peaceful, and relaxed — also used as "don't worry" or "chill out"
Encoding Strategies:
linguistic

tranquil
calm and peaceful
+
-o
adjective suffix
Tranquilo means calm and is related to the English word tranquil0.
tranquilo
calm, quiet, peaceful, relaxed, laid-back, unfazed
Free from noise, agitation, or disturbance.
Vivo en un barrio tranquiloI live in a quiet neighborhood
El lago estaba tranquilo esa mañanaThe lake was calm that morning
Mi jefe es muy tranquilo, nunca se estresaMy boss is very laid-back, he never stresses
Se quedó tranquila aunque todo salió malShe remained unfazed even though everything went wrong
calm down, relax, don't worry, chill (interjection)
Used on its own to tell someone to relax or not to worry.
¡Tranquilo, ya llegamos!Chill, we're almost there!
Tranquila, todo va a salir bienDon't worry, everything will be fine