resolute
courageous
immovable
indomitable
self-assured
steadfast
unabated
unafraid
unappalled
undaunted
undeterred
unflinching
unimpaired
unimpressed
uninjured
unknowing
unmoved
unperturbed
unruffled
unshaken
unswerving
unterrified
untouched
untroubled
unyielding