un-
Old Englishnot, reversal
Prefix · means "not, reversal"
About the prefix un-
A native English prefix for negation or reversal. It is the most productive negative prefix in English and can attach to adjectives, adverbs, and verbs.
Roots often paired with un-
Associated Words · 337
university
a higher education institution offering degree programs
unless
Except on the condition that; if not
unfortunately
Used to express that something is sad or unlucky
unusual
Not common or ordinary; out of the ordinary
universe
All existing matter and space; everything under consideration
unable
Lacking the ability or means to do something
unlike
Different from; not similar to
universal
Applying to all people or things; existing everywhere
unlikely
Not probable; not expected to happen
unknown
Not known or identified; something not yet understood
unemployment
The state of not having a job; the level of joblessness in an economy
unexpected
Not expected; happening by surprise
uncomfortable
Causing or feeling discomfort; uneasy
uncertain
Not sure or definite; not yet decided
unprecedented
Never having happened before; without precedent
uncover
To remove a cover from; to reveal something hidden
unfair
Not fair or just; biased or dishonest
unfold
To open something folded; to develop or be revealed
unhappy
Feeling sad or dissatisfied
unfortunate
Unlucky or marked by misfortune; regrettable
unnecessary
Not needed or required; superfluous
undoubtedly
Without doubt; certainly
unconscious
Not awake or aware; done without intention; the unconscious mind
unbelievable
Too extraordinary or improbable to believe; astonishing