The adjective has 3 meanings:
Meaning #1:
not physically disturbed or set in motion
Synonym: undisturbed
Antonym: agitated (meaning #2)
Meaning #2:
not agitated or disturbed emotionally
Synonym: undisturbed
Antonym: agitated (meaning #1)
Meaning #3:
not agitated; without losing self-possession
Synonym: calm
