The Collaborative International Dictionary of English v.0.48:

Unyielded \Unyielded\
   See yielded.
   ----- and the like.
   (c) To present participles which come from intransitive
       verbs, or are themselves employed as adjectives, to mark
       the absence of the activity, disposition, or condition
       implied by the participle; as,
       [1913 Webster] Unwriting
       Unworking
       Unwondering
       Unwithering
       Unwithdrawing
       Unwinning
       Unwinking
       Unweeping
       Unwavering
       Unwasting
       Unwaning
       Unwandering
       Unwalking
       Unvarying
       Unvacillating
       Untrifling
       Untrespassing
       Untrembling
       Untrading
       Untoiling
       Untiring
       Unthriving
       Untasting
       Unsympathizing
       Unswerving
       Unsweating
       Unsuspecting
       Unsurging
       Unsuiting
       Unsufficing
       Unsubmitting
       Unstooping
       Unstirring
       Unstinting
       Unspeaking
       Unslumbering
       Unslipping
       Unsleeping
       Unsinking
       Unshrinking
       Unsetting
       Unseeing
       Unsearching
       Unsatisfying
       Unsanctifying
       Unrewarding
       Unreturning
       Unresting
       Unresolving
       Unresisting
       Unrepulsing
       Unreproving
       Unrepining
       Unrepenting
       Unremembering
       Unrelishing
       Unrelaxing
       Unrejoicing
       Unrefusing
       Unrefunding
       Unreflecting
       Unreferring
       Unrecurring
       Unreclining
       Unrecalling
       Unreasoning
       Unquestioning
       Unquailing
       Unproving
       Unpromising
       Unprofiting
       Unprevaricating
       Unprevailing
       Unpretending
       Unpresuming
       Unprepossessing
       Unpreaching
       Unpossessing
       Unpleasing
       Unpitying
       Unperishing
       Unperforming
       Unperceiving
       Unpaying
       Unpardoning
       Unopening
       Unoffending
       Unobserving
       Unobliging
       Unmurmuring
       Unmoving
       Unmistrusting
       Unmeriting
       Unmeddling
       Unloving
       Unlistening
       Unlingering
       Unlaboring
       Unjarring
       Uninviting
       Unintoxicating
       Unintermitting
       Uninteresting
       Unimproving
       Unimposing
       Unimporting
       Unhurting
       Unhoping
       Unhesitating
       Unheeding
       Unharming
       Ungrudging
       Ungiving
       Unforgiving
       Unforeseeing
       Unforeboding
       Unforbearing
       Unfolding
       Unflinching
       Unflattering
       Unflagging
       Unfitting
       Unfighting
       Unfeigning
       Unfearing
       Unfaltering
       Unfainting
       Unfading
       Unfadging
       Unexisting
       Unenvying
       Unentertaining
       Unenterprising
       Unentering
       Unenjoying
       Unengaging
       Unenduring
       Unending
       Unedifying
       Unechoing
       Unebbing
       Undrooping
       Undreading
       Undoubting
       Undisturbing
       Undistracting
       Undistinguishing
       Undissolving
       Undissembling
       Undispensing
       Undisobliging
       Undiscriminating
       Undiscording
       Undiscerning
       Undifferencing
       Undeviating
       Undetesting
       Undespairing
       Undesiring
       Undeserving
       Underogating
       Undepending
       Undelaying
       Undecaying
       Undawning
       Unconvincing
       Unconversing
       Uncontriving
       Uncontending
       Unconsuming
       Unconsulting
       Unconspiring
       Unconsidering
       Unconsenting
       Unconniving
       Unconfessing
       Unconducing
       Unconceiving
       Uncomplying
       Uncomplaining
       Uncommunicating
       Uncharming
       Unchanging
       Unceasing
       Uncalculating
       Unburning
       Unbreathing
       Unbranching
       Unboding
       Unblushing
       Unblossoming
       Unblenching
       Unblemishing
       Unbleeding
       Unbleaching
       Unbelieving
       Unbeginning
       Unbefitting
       Unbearing
       Unattending
       Unattempting
       Unassisting
       Unaspiring
       Unapproving
       Unappreciating
       Unaltering
       Unalarming
       Unaiming
       Unailing
       Unaching
       Unaccommodating