unswerving (adj.)

• assiduous
• constant
• continuing
• diligent
• direct
• dogged
• enduring
• even
• faithful
• firm
• fixed
• flat
• flinty
• horizontal
• immediate
• immovable
• immutable
• inalterable
• indefatigable
• indomitable
• industrious
• inflexible
• insistent
• invincible
• irreversible
• lasting
• level
• lineal
• linear
• loyal
• obstinate
• one-way
• patient
• permanent
• persevering
• persistent
• persisting
• pertinacious
• plodding
• preoccupied
• rapt
• rectilineal
• rectilinear
• relentless
• resolute
• right
• sedulous
• set
• settled
• single-minded
• sleepless
• smooth
• stable
• staunch
• steadfast
• steady
• steely
• straight
• straightaway
• straightforward
• streamlined
• stubborn
• tenacious
• tireless
• true
• unbending
• unbent
• unbowed
• unbroken
• unconquerable
• uncurved
• undaunted
• undeviating
• undiscouraged
• undistorted
• unfailing
• unfaltering
• unflagging
• unflappable
• unflinching
• unidirectional
• uninterrupted
• unrelenting
• unremitting
• unshaken
• unsleeping
• untiring
• unturned
• unwavering
• unwearied
• unwearying
• unyielding
• upright
• vertical