unattached.adjective
not.joined; not committed.to or dependent on another person, group or organization; not engaged, married or involved in a romantic and/or sexual.relationship

umpire.noun,.plural.umpires
in sports, a person appointed to rule on plays, such as in baseball; a person appointed to settle a dispute that mediators have been unable to resolve; an arbitrator; one who judges by making a decision
umpire, umpired, umpiring, umpires.verbs
transitive verb use.to act as referee for; rule or judge
intransitive verb use.to be or act as a referee or an arbitrator

unkind, unkinder, unkindest.adjectives
lacking.kindness; inconsiderate or unsympathetic; harsh; severe (unkind winters)
unkindness.noun
unkindly, unkindlier, unkindliest.adjectives
not kindly; unkind
unkindly.adverb
in an unkind manner
unkindliness.noun

unsympathetic.adjective
not sympathetic or disposed toward (people who one would suppose to be sympathetic are oftentimes not so); not kind or helpful to someone who is having problems; lacking in sympathy and kindness; unkindly (she was surprisingly unsympathetic about her sister's problem; unfeeling; indifferent; coldhearted; hardhearted; heartless; uncompassionate; callous; unmerciful; uncaring; displeasing; unpleasant; unpleasing
unsympathetically.adverb

unfeeling.adjective
not having any physical feeling or sensation; not sharing in the pleasures or pains of others; callous
unfeelingly.adverb
unfeelingness.noun

unquiet, unquieter, unquietest.adjectives
not quiet; agitated; emotionally or mentally.restless or uneasy; characterized by unrest or disorder; turbulent
unquietly.adverb
unquietness.noun

ugly, uglier, ugliest.adjectives
displeasing to the eye; unsightly; repulsive or offensive; objectionable (an ugly building); bad; threatening or ominous (ugly black clouds in the sky portending a storm); marked by or inclined to anger or bad.feelings; cross or disagreeable (an ugly temper; an ugly scene)
ugly.noun,.plural.uglies
ugly is a word from the Old Norse word 'uggligr' meaning 'fear'; one that is ugly (these monkeys look downright ugly); repulsive
uglily.adverb
ugliness.noun

unselfish.adjective
generous or altruistic; selflessness
unselfishly.adverb
unselfishness.noun

unseat, unseated, unseating, unseats.transitive verbs
to remove from a seat or to dislodge from a location or position (she became unseated from her normally pleasant self); supplant

unhampered.adjective
not impeded or encumbered; not slowed or blocked or interfered with; not hampered

uncover, uncovered, uncovering, uncovers.verbs
transitive verb use.to remove the cover from (uncovered the saucepan); to manifest or disclose; reveal (uncovered new evidence); to remove the hat from, as in respect or reverence
intransitive verb use.to remove a cover; to bare the head in respect or reverence

upcoming.adjective
coming up; about to take place; occurring.soon; forthcoming; appear

upholster, upholstered, upholstering, upholsters.transitive verbs
to supply furniture with stuffing, springs, cushions and covering fabric
upholsterer.noun,.plural.upholsterers
one that upholsters furniture
upholstery.noun,.plural.upholsteries
the craft, trade or business of upholstering using fabric, stuffing and other materials

undeveloped.adjective
used.in order to.describe land which has not yet been used for building, farming, etc. (an undeveloped stretch of coastline); used in order to describe a country.or.area that does not have modern.industry and usually has a low standard of living; underdeveloped (the undeveloped regions of the world); not fully grown (a child's undeveloped mind); not yet.developed; in process of developing

underdeveloped.adjective
not having grown or developed as much as is usual or necessary; not adequately or normally developed; immature (underdeveloped leaves and flowers); processed in too weak a developing solution, or for too short a time or at too low a temperature to produce a normal degree of contrast, such as.happens with film; having a low level of economic.productivity and technological.sophistication within the range of possibility; developing (underdeveloped countries)
underdevelopment.noun,.plural.underdevelopments

unaggressive.adjective
not aggressive; not given to fighting or assertiveness; not a bully

unauthorized.adjective
done without authorization (they weren't authorized to use a lower grade of vegetables for the dinner party)

unenlightened.adjective
not having been enlightened

uneventful.adjective
occurring without disruption and interruption (they had a peaceful weekend at the summer cottage, with no negatives perforating it); marked by no noteworthy or untoward.incidents; lacking in significant.events
uneventfully.adverb
uneventfulness.noun

unguent.noun,.plural.unguents
a salve for soothing or healing; an ointment
unguentary.adjective

unmoor, unmoored, unmooring, unmoors.verbs
transitive verb use.to release from or as if from moorings
intransitive verb use.to cast off moorings

unashamed.adjective
feeling or showing no remorse, shame or need for apology; exhibiting no embarrassment; unabashed
unashamedly.adverb
unashamedness.noun

unabashed.adjective
not disconcerted or embarrassed; poised; not concealed or disguised; obvious (unabashed disgust)
unabashedly.adverb

unwell.adjective
being in poor health; sick
unwellness.noun
impairment of normal.physiological.function.affecting part or all of an organism; illness; malady; sickness

underserve, underserved, underserving, underserves transitive verbs
to supply with insufficient services such as social (financial), health and such as would be when dining at a restaurant