unfaltering (adj.)
- abiding
- arrogant
- assiduous
- assured
- calm
- cocksure
- confident
- constant
- continuing
- convinced
- coolheaded
- decided
- determined
- diligent
- dogged
- enduring
- faithful
- firm
- immutable
- inalterable
- indefatigable
- indomitable
- industrious
- insistent
- invincible
- lasting
- loyal
- nerveless
- obstinate
- overconfident
- overweening
- patient
- permanent
- persevering
- persistent
- persisting
- persuaded
- pertinacious
- plodding
- poised
- pompous
- positive
- preoccupied
- proud
- rapt
- reassured
- relaxed
- relentless
- resolute
- rock-steady
- secure
- sedulous
- self-assured
- self-confident
- self-important
- self-reliant
- single-minded
- sleepless
- stable
- steadfast
- steady
- stubborn
- sure
- tenacious
- tireless
- unafraid
- unblinking
- unconquerable
- undaunted
- undiscouraged
- unfailing
- unflagging
- unflinching
- unhesitating
- uninterrupted
- unqualified
- unquestioning
- unrelenting
- unremitting
- unshaken
- unshrinking
- unsleeping
- unstrained
- unswerving
- untiring
- unwavering
- unwearied
- unwearying
- wholehearted
So live, that when thy summons comes to join
The innumerable caravan which moves
To that mysterious realm where each shall take
His chamber in the silent halls of death,
Thou go not, like the quarry-slave at night,
Scourged to his dungeon, but sustained and soothed
By an unfaltering trust, approach thy grave
Like one that wraps the drapery of his couch
About him, and lies down to pleasant dreams.