undaunted (adj.)
- assiduous
- audacious
- bold
- constant
- continuing
- courageous
- dauntless
- diligent
- dogged
- enduring
- faithful
- fearless
- immutable
- inalterable
- indefatigable
- indomitable
- industrious
- insistent
- intrepid
- invincible
- lasting
- loyal
- obstinate
- patient
- permanent
- persevering
- persistent
- persisting
- pertinacious
- plodding
- preoccupied
- rapt
- relentless
- resolute
- sedulous
- single-minded
- sleepless
- stable
- steadfast
- steady
- stubborn
- tenacious
- tireless
- unabashed
- unawed
- unblinking
- unconquerable
- undiscouraged
- undismayed
- unfailing
- unfaltering
- unflagging
- unflinching
- uninterrupted
- unintimidated
- unrelenting
- unremitting
- unshrinking
- unsleeping
- unswerving
- untiring
- unwavering
- unwearied
- unwearying
- valiant
- valorous
