fearless
fear-less
adjective
Showing no fear; brave and courageous when facing danger or difficulty.
"The fearless climber scaled the mountain."
Thesaurus
Synonyms: unafraid, unfrightened, unblinking, unintimidated, unflinching, unshrinking, unapprehensive, unfearing, intrepid, brave, audacious, bold
Antonyms: afraid(p)