unsieved
Not having been sieved.

unsighing
Not sighing.

unsightable
Invisible.

unsightlier
comparative form of unsightly: more unsightly

unsightliest
superlative form of unsightly: most unsightly

unsightly
Displeasing to the eye.

unsightreadable
Not sightreadable.

unsigmatic
Not sigmatic.

unsignable
Not signable.

unsignaled
Not signaled.

unsignalised
Alternative spelling of unsignalized

unsignalized
Not signalized.

unsignalled
Not signalled.

unsignatured
Without a signature; unsigned.

unsigneted
Not signeted.

unsignifiable
That cannot be signified.

unsignificative
Not significative.

unsignified
Not signified.

unsignifying
That does not signify; meaningless or unimportant.

unsignposted
Not provided with a signpost.

unsilenceable
Unable to be silenced

unsilent
Not silent.

unsilhouetted
Not silhouetted.

unsilicified
Not silicified.

unsiliconized
Not siliconized.

unsilled
Not furnished with a sill.

unsilly
Not silly.

unsiloed
Not siloed.

unsilted
Not silted.

unsilty
Not silty.

unsilvered
Not silvered.

unsimilar
dissimilar

unsimpable
Impossible or difficult to simp for.

unsimpables
plural of unsimpable

unsimple
Not simple.

unsimplifiable
Not capable of being simplified.

unsimplified
Not simplified.

unsimplistic
Not simplistic.

unsimulable
That cannot be simulated.

unsimulated
Not simulated; real, authentic.

unsimultaneous
Not simultaneous.

unsincere
insincere

unsinewy
Not sinewy.

unsinful
Not sinful.

unsingable
Not singable; impossible to sing.

unsinged
Not singed.

unsingle
Not single.

unsingled
Not singled.

unsingular
Not singular.

unsinister
Not sinister.

unsinking
That does not sink.

unsintered
Not sintered

unsinuous
Not sinuous.

unsiphoned
Not siphoned.

unsipped
Not sipped.

unsired
Not sired.

unsissy
Not sissy.

unsistered
simple past and past participle of unsister

unsisterlike
Not sisterlike.

unsisterly
Not sisterly; not befitting a sister.

unsittable
Unable to be sat on.
Unpleasant to sit on; unpleasant when sat on; uncomfortable.
Intolerable; not able to be tolerated.

unsituated
Not situated; without a situation or position; lacking a place.

unsized
Not sized

unskated
That has not been skated on.

unskeined
Not skeined.

unskeletonized
Not skeletonized.

unskeptical
Not skeptical; having an open mind.

unsketchable
Not sketchable.

unsketched
Not sketched.

unskewed
Not skewed.

unskewered
Not skewered.

unskiable
Not skiable; unsuitable for skiing.

unskied
Not skied.

unskilful
Alternative spelling of unskillful.

unskilled
Of a person or workforce: not having a skill or technical training.
Of a job: not requiring skill or training.
Of a made object: inexpertly made or showing a lack of skill.

unskillful
Not skillful.

unskimmed
Not skimmed

unskimped
Done properly, not carelessly or inadequately.

unskimpy
Not skimpy.

unskinny
Not skinny.
Not skinny.

unskipable
Misspelling of unskippable.

unskippable
That cannot be skipped.

unskipped
Not skipped.

unskirted
Without a skirt.
Not skirted or surrounded.

unskittish
Not skittish.

unskunked
Not skunked.

unslack
Not slack.

unslacked
Alternative form of unslaked.

unslackened
Not slackened.

unslackening
Not slackening; without loss of speed.

unslacking
Not slacking; without respite.

unslagged
Not slagged.

unslain
Not slain; not killed.

unslakable
That cannot be slaked.

unslakeable
That cannot be slaked

unslaked
Not yet slaked

unslammable
Unable to be slammed.

unslammed
Not having been slammed.

unslandered
Not slandered.

unslanderous
Not slanderous.

unslanted
Not slanted.

unslappable
Not slappable.

unslapped
Not having been slapped.

unslashed
Not slashed.

unslatted
Not slatted.

unslaughterable
Not fit or ready for slaughter.

unslaughtered
Not slaughtered.
Not slaughtered.

unslavish
Not slavish.

unslayable
Incapable of being slain.

unsleazy
Not sleazy.

unsleepable
Not sleepable; unsuitable for sleeping.

unsleepful
Not sleepful

unsleepingly
Without sleeping; vigilantly.

unsleepy
Not sleepy; wakeful.

unslender
Not slender.

unsliced
Not sliced.

unslighted
Not slighted.

unslim
Not slim.

unslimed
Not covered in slime.

unslippered
Not wearing slippers.

unslippery
Not slippery.

unslit
Not having been slit.

unslitted
Not slitted.

unslockened
unslaked

unsloped
Not sloped.

unsloping
Not sloping.

unslopped
Not slopped.

unsloppy
Not sloppy.

unslothful
Not slothful.

unsloughed
Not sloughed.

unsloughing
That does not slough.

unslowed
Not slowed.

unslowing
Not becoming any slower.

unsluggish
Not sluggish; rapid or energetic.

unslumbering
Not slumbering; unsleeping.

unslumberous
Alternative form of unslumbrous.

unslurped
Not slurped.

unslurred
Not slurred

unslutty
Not slutty.

unsly
Not sly; lacking slyness

unsmacked
Not smacked.

unsmart
Not smart (in various senses).

unsmashable
That cannot be smashed.

unsmeared
Not smeared.

unsmelled
Not having been smelled.

unsmelling
That does not or cannot smell; lacking or not using the sense of smell.

unsmelly
Not smelly; not having an unpleasant smell

unsmelt
Not having been smelled.

unsmeltable
Not smeltable.

unsmelted
Not smelted; not having been subjected to a smelting process; still in the state of being an unrefined ore.

unsmiled
Not smiled.

unsmiling
Not smiling; serious or grave

unsmirched
Not having been smirched; unbesmirched.

unsmirking
Not smirking.

unsmitten
Not having been smitten.

unsmocked
Not smocked.

unsmokable
Impossible or undesirable to smoke.

unsmokeable
Alternative form of unsmokable.

unsmoked
not preserved by treatment with smoke and thus retaining more of the original flavour, for example: unsmoked bacon or salmon.
not lit, not burnt. (of a cigarette, cigar or pipe)

unsmoking
Not smoking.

unsmoky
Not smoky.

unsmooched
Not having been smooched (kissed)

unsmoothable
That cannot be smoothed.

unsmoothed
Not smoothed

unsmotherable
unquenchable

unsmothered
Not smothered.

unsmudged
Not smudged.

unsmug
Not smug

unsmuggled
Not smuggled.

unsmutched
Not smutched.

unsmutted
Not tainted by the smut fungus.

unsmutty
Not smutty.

unsnakelike
Not snakelike.

unsnaky
Not snaky.

unsnappable
Not snappable; that cannot be snapped; inseverable.

unsnared
Not snared.

unsneering
Not sneering.

unsneezed
Not sneezed.
Not having sneezed.

unsneezing
Not sneezing.
Devoid of sneezes.

unsniffed
Not sniffed.

unsnipped
Not snipped; intact.
Uncircumcised.

unsnobbish
Not snobbish; humble, sociable and friendly, treating everybody including inferiors equally.

unsnobby
Not snobby.

unsnogged
Not having received a snog (kiss)

unsnoring
Not snoring.

unsnowed
Not covered in snow.

unsnowing
Not snowing.

unsnowy
Not snowy.

unsnubbable
Incapable of being snubbed.

unsnubbed
Not snubbed.

unsnuffed
Not snuffed.

unsnuggly
Not snuggly

unsoaked
That has not been soaked.

unsoaped
Not soaped.
Not soaped.

unsoapy
Synonym of nonsoapy.

unsoarable
Not suitable for soaring.

unsober
Not sober.

unsobered
Not made sober.

unsobering
Not sobering.

unsociable
not desiring the company of others
not congenial or compatible
unfriendly

unsocial
Not social.
Not seeking or showing the desire for the company of others; inhospitable.

unsocialised
Alternative form of unsocialized.

unsocialist
Not socialist; contrary to the tenets of socialism.

unsocialistic
Not socialistic; contrary to the tenets of socialism.

unsocializable
Not socializable.

unsocialized
Not having been socialized.

unsociological
Not sociological.

unsocked
Not wearing a sock or socks.

unsodded
Not covered with sod; lacking turf.

unsodden
Not sodden; not saturated with moisture or weighed down by excessive wetness.

unsodomized
Not sodomized.

unsoftenable
Not softenable.

unsoftened
Not softened.

unsoftening
Not growing softer.

unsoggy
Not soggy.

unsoilable
Not soilable; that cannot be soiled.

unsolaced
Not solaced.

unsolacing
Not affording solace; not comforting.

unsolar
Not solar.

unsolarized
Not solarized.

unsoldierlike
Not soldierlike.