Adjectives That Start With U

700 words Words by letter Checked 9 Oct 2026

These adjectives that start with U come from a standard English dictionary used for word games, ranked by how often each word is used in everyday writing. There are 700 adjectives starting with U on this page. The 100 most common come first, each with a short meaning, followed by shorter, longer and easier picks and a filter for any ending or length.

U surprises many people, because with 700 adjectives it is the largest letter on this page. The reason is the prefix un-, which turns words into their opposites: unable, unknown, unusual, unfair and unlimited all follow this pattern.

Not every U word is negative. Unique, useful, ultimate and universal are positive or neutral. Urban and upper describe place and position, and upcoming and urgent relate to time. For learners, spotting un- is a quick way to understand meaning without a dictionary, and it doubles the vocabulary they already have.

Adjectives starting with U: 700
Most used: under
Longest common one: unconstitutional 16 letters

Most common adjectives that start with U

Ranked by how often the word appears in English text. "Type" is the word's main part of speech.

#	Word	Meaning	Type
1	under	located below or beneath something else	adj.
2	unique	radically distinctive and without equal	adj.
3	upper	higher in place or position	adj.
4	useful	being of use or service	adj.
5	urban	relating to or concerned with a city or densely populated area	adj.
6	usual	occurring or encountered or experienced or observed frequently or in accordance with regular practice or...	adj.
7	unable	(usually followed by `to') not having the necessary means or skill or know-how	adj.
8	unlike	marked by dissimilarity	adj.
9	ultimate	furthest or highest in degree or order; utmost or extreme	adj.
10	unknown	not known	adj.
11	universal	of worldwide scope or applicability; ; - Christopher Morley	adj.
12	unusual	not usual or common or ordinary	adj.
13	ugly	displeasing to the senses	adj.
14	upcoming	of the relatively near future	adj.
15	underground	under the level of the ground	adj.
16	unlikely	not likely to be true or to occur or to have occurred	adj.
17	ultra	(used of opinions and actions) far beyond the norm	adj.
18	unexpected	not expected or anticipated	adj.
19	useless	having no beneficial use or incapable of functioning usefully	adj.
20	uncomfortable	conducive to or feeling mental discomfort	adj.
21	unnecessary	not necessary	adj.
22	unfair	not fair; marked by injustice or partiality or deception	adj.
23	urgent	compelling immediate action	adj.
24	unfortunate	not favored by fortune; marked or accompanied by or resulting in ill fortune	adj.
25	unlimited	having no limits in range or scope; - Philip Rahv	adj.
26	unbelievable	beyond belief or understanding	adj.
27	unhappy	experiencing or marked by or causing sadness or sorrow or discontent	adj.
28	uncertain	lacking or indicating lack of confidence or assurance	adj.
29	unconscious	not conscious; lacking awareness and the capacity for sensory perception as if asleep or dead	adj.
30	unclear	poorly stated or described	adj.
31	underwater	beneath the surface of the water	adj.
32	unemployed	not engaged in a gainful occupation	adj.
33	unacceptable	not adequate to give satisfaction	adj.
34	unaware	(often followed by `of') not aware	adj.
35	uncommon	not common or ordinarily encountered; unusually great in amount or remarkable in character or kind	adj.
36	underway	currently in progress	adj.
37	unstable	lacking stability or fixity or firmness	adj.
38	unprecedented	having no precedent; novel	adj.
39	unpleasant	disagreeable to the senses, to the mind, or feelings	adj.
40	unrelated	lacking a logical or causal relation	adj.
41	unwanted	not wanted; not needed	adj.
42	undercover	conducted with or marked by hidden aims or methods	adj.
43	unreasonable	not reasonable; not showing good judgment	adj.
44	unsure	lacking self-confidence	adj.
45	unchanged	not made or become different	adj.
46	understandable	capable of being apprehended or understood	adj.
47	upright	in a vertical position; not sloping	adj.
48	unpaid	not paid	adj.
49	unsuccessful	not successful; having failed or having an unfavorable outcome	adj.
50	unfinished	not brought to the desired final state	adj.
51	unhealthy	not in or exhibiting good health in body or mind	adj.
52	unlawful	not conforming to legality, moral law, or social convention	adj.
53	unpopular	regarded with disfavor or lacking general approval	adj.
54	unwilling	not disposed or inclined toward	adj.
55	unanimous	in complete agreement	adj.
56	unpredictable	not capable of being foretold	adj.
57	unsafe	lacking in security or safety	adj.
58	unofficial	not having official authority or sanction	adj.
59	unconstitutional	not consistent with or according to a constitution; contrary to the U.S. Constitution	adj.
60	unused	not yet used or soiled	adj.
61	unavailable	not available or accessible or at hand	adj.
62	unlucky	having or bringing misfortune	adj.
63	undefeated	victorious	adj.
64	unfamiliar	not known or well known	adj.
65	unidentified	not yet identified	adj.
66	unseen	not observed	adj.
67	utmost	of the greatest possible degree or extent or intensity	adj.
68	unreal	lacking in reality or substance or genuineness; not corresponding to acknowledged facts or criteria	adj.
69	unauthorized	not endowed with authority	adj.
70	unnamed	being or having an unknown or unnamed source	adj.
71	uneven	not even or uniform as e.g. in shape or texture	adj.
72	unrealistic	not realistic	adj.
73	unreliable	liable to be erroneous or misleading	adj.
74	upbeat	pleasantly (even unrealistically) optimistic	adj.
75	usable	capable of being put to use	adj.
76	unfit	below the required standards for a purpose	adj.
77	unconditional	not conditional	adj.
78	unforgettable	impossible to forget	adj.
79	unnatural	not in accordance with or determined by nature; contrary to nature	adj.
80	unstoppable	not capable of being stopped	adj.
81	upfront	frank and honest	adj.
82	unbearable	incapable of being put up with	adj.
83	underage	not of legal age	adj.
84	unmarried	not married or related to the unmarried state	adj.
85	uneasy	lacking a sense of security or affording no ease or reassurance	adj.
86	undocumented	lacking necessary documents (as for e.g. permission to live or work in a country)	adj.
87	unjust	not fair; marked by injustice or partiality or deception	adj.
88	ubiquitous	being present everywhere at once	adj.
89	unconventional	not conforming to accepted rules or standards	adj.
90	unnoticed	not noticed	adj.
91	untouched	still full	adj.
92	unpublished	not published	adj.
93	untrue	not according with the facts	adj.
94	unborn	not yet brought into existence	adj.
95	undisclosed	not made known	adj.
96	unheard	not necessarily inaudible but not heard	adj.
97	unattractive	lacking beauty or charm	adj.
98	unbeaten	not conquered	adj.
99	undesirable	not wanted	adj.
100	unavoidable	impossible to avoid or evade:	adj.

Positive adjectives that start with U

useful
unlimited
understandable
unreal
upbeat
usable
unconditional
unforgettable
unaffected
unbiased
upscale
unrestricted
undisputed
unparalleled
unbeatable
unmatched
unwavering
unequivocal
unfettered
uncomplicated
undamaged
unselfish
undaunted
unquestionable
useable
unabashed
unencumbered
unassailable
unrivaled

Short adjectives that start with U

under
upper
urban
usual
ugly
ultra
unfit
undue
uncut
uric
unwed
unlit
ulnar
unary

Long adjectives that start with U

underground
unexpected
uncomfortable
unnecessary
unfortunate
unbelievable
unconscious
underwater
unemployed
unacceptable
unprecedented
unpleasant
undercover
unreasonable
understandable
unsuccessful
unfinished
unpredictable
unofficial
unconstitutional
unavailable
undefeated
unfamiliar
unidentified
unauthorized
unrealistic
unreliable
unconditional
unforgettable
unstoppable

Filter all 700 adjectives that start with U

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Questions people ask

How many adjectives start with U?

This list has 700 adjectives starting with U, taken from a standard word-game dictionary and limited to words that appear in real English text.

What are the most common adjectives that start with U?

under, unique, upper, useful, urban, usual, unable, unlike are the most used in everyday English.

What are some long adjectives that start with U?

universal, underground, unexpected, uncomfortable, unnecessary.

What are easy adjectives that start with U for kids?

under, unique, upper, useful, urban, usual are short, everyday examples.

Source: the ENABLE word list (a public-domain dictionary used for word games), ranked by how often each word appears in English text (the open wordfreq project), with short meanings from Princeton WordNet. Offensive words are left out.

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