underscreened
Insufficiently screened

underscrupulous
Insufficiently scrupulous.

undersea
Existing, relating to, or made for use beneath the sea.

underseasoned
Lacking sufficient seasoning.

underseat
Located under a seat (typically as a fixed part of the overall structure of the vehicle).

underseated
Having too few seats.

undersecretarial
Of or pertaining to an undersecretary.

undersedated
Insufficiently sedated

underseeded
Inadequately seeded.

undersegmented
Less than normally segmented

underselective
Not sufficiently selective.

undersensitive
Insufficiently sensitive.

undersequenced
Insufficiently sequenced

underserved
Underresourced; not having sufficient service.
Underresourced; not having sufficient service.
Underresourced; not having sufficient service.

undersexed
Lacking sufficient sexual desire or activity; sexually unfulfilled; sexually frustrated.

undershirted
Wearing an undershirt.

undershrubby
Being or resembling an undershrub.

undershut
Closed from below.

undersialylated
Insufficiently sialylated

undersigned
Having signatures at the end or bottom.
Having signed at the end of a document.

undersill
Beneath a sill.

undersills
plural of undersill

undersized
below the usual or expected size

underskilled
Insufficiently skilled

undersmoothed
Insufficiently smoothed

undersnow
Beneath snow.

undersocialised
Alternative form of undersocialized.

undersocialized
Insufficiently assimilated into society; antisocial.

undersold
simple past and past participle of undersell

undersparred
Having spars smaller than the usual dimension, or not enough spars.

underspecific
Not specific enough.

underspiced
Not spiced strongly enough.

underspread
spread underneath

underspun
Too lightly or loosely spun.

undersquare
Alternative form of under square.

understaffed
having an inadequate number of workers or assistants

understandable
Capable of being understood; comprehensible.
Capable of being accepted or excused under the circumstances.

understandible
Misspelling of understandable.

understated
Restrained and unpretentious.

understimulated
simple past and past participle of understimulate

understocked
simple past and past participle of understock

understored
Having fewer stores (shops) than are needed by the available market

understrength
Lacking in number (of a military unit, sport team, etc.)
Lacking in strength or durability (of a material or structure)

understringent
Not stringent enough

understroke
A lower or underlining stroke in writing.

understrung
Of a bow: having too long a string.

understuffed
Inadequately stuffed.

understyled
Not made sufficiently stylish.

undersufficient
Inadequate.

undersulfated
Less than normally sulfated

undersurveyed
Insufficiently surveyed

undertail
Beneath a tail.
On the underside of the tail.

undertails
plural of undertail

undertakable
Capable of being undertaken; practicable.

undertakerish
Resembling or characteristic of an undertaker (funeral director).

undertakerlike
Resembling or characteristic of an undertaker (funeral director).

undertakerly
Resembling or characteristic of an undertaker (funeral director).

undertalented
Lacking talent.

undertested
Not having undergone sufficient testing.

undertheorised
Alternative form of undertheorized.

undertheorized
Insufficiently theoretically studied or researched.

underthreshold
Positioned below a threshold.
Being below the threshold or outside of the ordinary limits of consciousness; subconscious; subliminal.

undertile
Of or pertaining to an area or surface beneath or below tile.

undertoasted
Toasted insufficiently.

undertooled
Inadequately tooled; lacking tools.

undertrack
underneath a (railway) track

undertracks
plural of undertrack

undertrained
Not having adequate training.

undertranslated
Less than normally translated.

undertransmitted
Excessively transmitted

undertrodden
Synonym of downtrodden (“oppressed, persecuted, subjugated”).

underturnkey
A subordinate turnkey.

undertwisted
Insufficiently twisted (typically of DNA)

underutilised
Alternative spelling of underutilized.

underutilized
Insufficiently utilized.

undervascularized
Insufficiently vascularized

underviewed
Not viewed enough.

undervine
Beneath a vine

undervirilised
Alternative form of undervirilized.

undervirilized
Exhibiting undervirilization.

undervisited
Not visited often enough, or by a sufficient number of visitors.

undervitalized
Lacking energy.

undervolted
Having the voltage reduced from that originally supplied by the manufacturer.

underwaterish
As if underwater.

underweared
Wearing underwear.

underwearless
Without underwear.

underwired
Fitted with wiring or straps to provide better support for the breasts.

underwise
On or to the bottom or underside of; beneath; underneath.
Below; hereafter.

underwitted
Weak in intellect; half-witted; silly.

underwomaned
Rare spelling of underwomanned.

underwomanned
Inadequately womaned.

underwooded
Having underbrush.

underworldly
Befitting the underworld.

undescaled
Not descaled; from which scale has not been removed.

undescended
Not descended.

undescribable
Alternative form of indescribable.

undescribed
Not described
Not previously known to science

undescried
Not having been descried.

undescript
Nondescript.

undescriptive
Not descriptive.

undescrying
That does not descry.

undesecrated
Not desecrated.

undesensitized
Not desensitized.

undeserted
Not deserted.

undesertified
Not desertified.

undeserting
That does not desert or abandon.

undeserved
Not deserved, earned or merited; unjustifiable or unfair.

undeserving
Considered unworthy of reward.

undesignable
That cannot be designed.

undesignated
Not designated.

undesigned
Not designed, not intended.
Not designed, not drawn or planned before being made.

undesigning
Having no artful, ulterior, or fraudulent purpose; sincere; artless; ingenuous.

undesirable
Not desirable, objectionable or not likely to please.

undesirables
plural of undesirable

undesireable
Alternative form of undesirable.

undesired
Not desired; unwanted.

undesiring
Not desiring something.

undesirous
Not desirous
Undesirable

undesisting
Not desisting.

undesked
Not having a desk; without a desk.
Not having been looked at or sub-edited by a desk-based journalist.

undespairing
Not despairing.

undespatched
Alternative spelling of undispatched.

undesperate
Not desperate.

undespicable
Not despicable.

undespised
not despised

undespising
Not despising.

undespoilable
Not despoilable.

undespoiled
Not despoiled.

undespondent
Not despondent.

undesponding
Not desponding.

undespotic
Not despotic.

undestined
Not destined.

undestroyable
Not able to be destroyed; indestructible.

undestructable
Alternative form of undestructible.

undestructible
Not destructible; indestructible.

undestructive
Not destructive; helpful.

undetachable
Unable to be detached.

undetached
Not detached.

undetailed
Not detailed.

undetainable
Not detainable.

undetained
Not detained.

undetd
Abbreviation of undetermined.

undetectable
Unable to be detected; not detectable.

undetected
Not found; undiscovered.

undetectible
Misspelling of undetectable.

undeteriorated
Not deteriorated.

undeteriorating
Not deteriorating.

undeterminable
Not possible to determine.

undetermined
Not determined; not settled; not decided.
Not limited; not defined; indeterminate.

undeterministic
Not deterministic.

undeterrable
That cannot be deterred

undeterred
Not deterred or put off; undiscouraged.

undeterring
Not deterring; not acting as a deterrent.

undetestable
Not detestable.

undetested
Not detested.

undetesting
Not detesting.

undethronable
That cannot be dethroned.

undethroned
Not dethroned.

undetonated
Not (yet) detonated

undetoxified
Not detoxified.

undetrimental
Not detrimental.

undeuterated
Not deuterated; having the natural distribution of hydrogen isotopes, or only the form with a single neutron

undevastated
Not devastated.

undevastating
Not devastating.