serene

serene is an   Adverb

Definition:

[1] Bright; clear; unabscured; as, a serene sky. The moon serene in glory mounts the sky. Pope. Full many a gem of purest ray serene The dark unfathomed caves of ocean bear. Gray.

[2] Calm; placid; undisturbed; unruffled; as, a serene aspect; a serene soul. Milton.

Synonyms: