serena
adj. C2 Proficiency US //səˈɹinə// UK //sɛɹˈiːnɐ// ser·e·na
adj. calm, peaceful, and not worried. It describes a person or a place that feels very quiet and relaxed.
adj. characterised by being calm, peaceful, and untroubled. Often used to describe a person's disposition or a quiet environment; frequently follows a linking verb.
From the name of an early Christian saint, Latin serena (“serene”).
Usage
Typically used as a predicative adjective following 'be', 'remain', or 'look'.