Definitions

1. adjective

showing a fearless and confident attitude; bold and daring

“The dauntless explorer climbed the mountain without any assistance.”

2. noun

a person or thing that is bold and fearless

“The dauntless sailor braved the stormy sea.”

3. adverb

in a fearless and confident manner; boldly and daringly

“She spoke dauntlessly about her plans to the entire audience.”