Main entry: unafraid, untroubled, secure
Definition: free from fear or doubt; easy in mind
Usage: he was secure that nothing will be held against him
Antonyms: insecure
Definition: lacking self-confidence or assurance
Main entry: unafraid, fearless
Definition: oblivious of dangers or perils or calmly resolute in facing them
Antonyms: afraid
Definition: filled with fear or apprehension