unredactable
That cannot be redacted or censored.

unredeemable
Not redeemable; irredeemable.

unredefined
Not redefined.

unredeployed
Not having been redeployed.

unredirected
Not redirected.

unredoubtable
Not redoubtable.

unredressable
Not redressable, that cannot be redressed.

unredressed
Not redressed.

unredressible
Alternative form of unredressable.

unreduceable
Alternative form of unreducible.

unreduced
Not reduced or subjected to reduction

unreducible
Not reducible.

unreducing
Not reducing; not causing reduction.

unreductive
Not reductive.

unreduplicated
Not reduplicated.

unreelable
Not reelable.

unrefactored
That has not been refactored.

unrefereed
Not judged by a formal referee.
Of a journal article: not reviewed before being printed.

unreferenceable
That cannot be referenced.

unreferenced
Not referenced.

unreferred
Not referred.

unrefillable
Not refillable.

unrefilled
Not refilled.

unrefinable
Not refinable.

unrefitted
Not refitted.

unreflected
Not reflected.

unreflecting
Not giving reflection or thought to one's actions, words, conclusions, etc.; (of an action, statement, conclusion, etc.) done without reflection or thought. (of a person)
That does not reflect light or sound.

unreflective
Not reflective; thoughtless

unreflectively
In an unreflective way.

unreflexive
Not reflexive

unreformable
That cannot be reformed.

unreformed
Not reformed.

unreforming
That does not reform.

unrefracted
Not refracted

unrefracting
Not refracting.

unrefractive
Not refractive.

unrefractory
Not refractory.

unrefraining
Not refraining from something.

unrefreshed
Not refreshed.

unrefreshful
Not refreshful.

unrefreshing
Not refreshing.

unrefueled
Not refueled.

unrefuelled
Alternative form of unrefueled.

unrefulgent
Not refulgent.

unrefundable
Not refundable.

unrefunded
Not refunded.

unrefurbished
Not having been refurbished.

unrefusable
That cannot be refused.

unrefused
Not refused.

unrefusing
Not refusing.

unrefutable
Not refutable.

unrefuted
Not refuted.

unrefuting
Not refuting.

unregainable
That cannot be regained; irrecoverable.

unregained
Not regained.

unregal
Not regal; particularly, not appropriate for a royal.

unregaled
Not regaled.

unregardable
Not noteworthy.

unregarded
Not regarded; unnoticed.

unregardful
Not regardful.

unregarding
unseeing

unregardless
Not regarding, not paying regard or attention to (things).

unregenerable
That cannot be regenerated.

unregenerate
Which cannot be transformed in mind and spirit.
Stubborn.

unregenerated
Not regenerated; unimproved.

unregenerating
Not regenerating.

unregenerative
Not regenerative.

unregimentable
Not able to be ordered or systematized.

unregimental
Not regimental.

unregimented
Not regimented, unorganised.

unregionalized
Not regionalized.

unregisterable
Alternative spelling of unregistrable.

unregistered
Not registered.

unregistrable
In United States trademark law, incapable of receiving trademark registration.

unregressed
Not regressed.

unregressive
Not regressive.

unregretful
Not regretful; having no regrets.

unregrettable
Not regrettable.

unregretted
Not regretted.

unregretting
Not regretting.

unregular
Not regular; irregular, uncommon

unregularised
Alternative spelling of unregularized.

unregularized
Not regularized

unregulatable
Not regulatable.

unregulated
Not regulated: not subject to any regulations.

unregulative
Not regulative.

unregulatory
Not regulatory

unregurgitated
Not regurgitated.

unrehabbed
Not rehabilitated.

unrehabilitatable
Not capable of being rehabilitated.

unrehabilitated
Not rehabilitated.

unrehearsable
Not rehearsable.

unrehearsed
Not rehearsed

unreified
Not reified.

unreigning
Not reigning.

unreimbursable
Not reimbursable.

unreimbursed
Not reimbursed.

unreincarnated
Not reincarnated.

unreinforced
Not reinforced.

unreinstated
Not reinstated.

unreiterable
Not reiterable.

unreiterated
Not reiterated.

unrejectable
Not rejectable.

unrejected
Not rejected.

unrejoiced
Not rejoiced.

unrejoicing
Not rejoicing.

unrejoinable
That cannot be rejoined

unrejoined
Not rejoined.

unrejuvenated
Not rejuvenated.

unrelapsing
That does not relapse.

unrelatable
Not relatable.

unrelational
Not relational.

unrelationshiped
Alternative spelling of unrelationshipped.

unrelationshipped
Not in a romantic relationship; single.

unrelative
Not relative to something else; absolute.

unrelativized
Not relativized

unrelaxable
Unable to be relaxed; not capable of being relaxed.

unrelaxed
Not relaxed

unrelaxing
Not relaxing.

unreleasable
Not releasable; that cannot be released or is unsuitable for release.

unreleased
Not released.
Of a stop consonant, remaining occluded when spoken.

unrelegated
Not relegated.

unrelented
Synonym of unrelenting.

unrelenting
Not relenting; not yielding in strength, severity, or determination.
Having no pity; not being or becoming lenient, mild, gentle, or merciful.

unrelentless
Without respite or let up; unrelenting; relentless.

unrelevant
not relevant

unreliable
Not reliable.

unreliant
Not reliant.

unrelievable
Not relievable.

unrelieveable
Alternative form of unrelievable.

unrelieved
Utter; complete; without relief.

unrelieving
From which there is no relief; unrelenting.

unreligious
Not religious.

unrelinquishable
That cannot be relinquished.

unrelinquished
Not relinquished.

unrelinquishing
Not relinquishing.

unrelishable
Not relishable.

unrelished
Not relished.

unrelocatable
Not relocatable.

unreluctant
Not reluctant.

unremaindered
Not remaindered.

unremaining
That does not remain.

unremanded
Not remanded.

unremarkable
Not remarkable.

unremarked
Not the subject of any remark
Not remarked or noticed; unnoticed.

unremarried
Not having married again (following the death of one’s spouse, divorce, etc.)

unremastered
Not remastered.

unremediable
irremediable

unremediated
Not remediated

unremedied
Not remedied.

unrememberable
That cannot be remembered.

unremembered
Not remembered.

unremembering
Not remembering; forgetful.

unreminded
Not reminded.

unremineralized
Not remineralized

unreminiscent
Not reminiscent.

unremissible
Not remissible.

unremittable
That cannot be remitted.

unremittant
Alternative form of unremittent.

unremitted
Not remitted or allowed to slacken; continued.

unremittent
Unremitting.

unremitting
Incessant; never slackening.

unremixed
Not remixed; not having been remixed.

unremodeled
Not remodeled.

unremodelled
Not remodelled.

unremonstrant
Not remonstrant.

unremonstrated
Not remonstrated (with, against, etc.).

unremonstrating
Not remonstrating.

unremorseful
not remorseful

unremote
Not remote.

unremoulded
Not remoulded.

unremounted
Not remounted.

unremovable
Unable to be removed.

unremoved
Not (yet) removed.

unremunerated
Not remunerated; unpaid

unremunerating
unremunerative

unremunerative
Not remunerative.

unrenamable
That cannot be renamed.

unrenderable
Not renderable.

unrendered
Not rendered.

unrenewable
Not renewable.

unrenewed
Not renewed.

unrenormalizable
Not able to be renormalized.

unrenormalized
Not renormalized

unrenounceable
Not renounceable.

unrenounced
not renounced

unrenouncing
That does not renounce.

unrenovated
Not renovated; not having undergone renovation.

unrenowned
Not renowned.

unrent
Not having been rent or torn; intact.

unrentable
Not fit, suitable or appropriate to be rented.

unrented
Not rented.

unreorganized
Not reorganized.

unrepackaged
Not repackaged; in its original packaging.

unrepaid
not yet repaid

unrepairable
Impossible to repair.

unrepaired
Not repaired.

unreparted
Not reparted.

unrepatriable
not able to be repatriated

unrepatriated
Not repatriated.

unrepayable
not capable of being repaid

unrepealable
Not repealable.

unrepeatable
Unable to be repeated
(of an experiment or procedure) That gives different results when repeated

unrepeated
Not having been repeated

unrepeating
Not repeating.

unrepellable
Not repellable.

unrepelled
Not repelled.