How do you spell Serene

Available Definitions:
1)  a. - Bright; clear; unabscured; as, a serene sky.
2)  a. - Calm; placid; undisturbed; unruffled; as, a serene aspect; a serene soul.
3)  n. - Serenity; clearness; calmness.
4)  n. - Evening air; night chill.
5)  v. t. - To make serene.