The prefix -un in English means "not" or "the opposite of". For example, unhappy is a way of saying "not happy".
The prefix -un can be used with adjectives (e.g. happy, usual), adverbs (e.g. happily, usually), and verbs (e.g. do). Where would we be in computing without the Undo command?!
Other un- words include:
words beginning with un: * unit * untie * unique * unicycle * uncle * under * understand * unhappy * uncommon * unhealthy * untie * uneventable * uneven * until * untangle * unwind * uninterested * unkind * untidy * unveil * untouchable * untrue * unruly * unstrap * unsettled * unroll * unreasonable * unpleasant * unplugged * unquestioning * unscrew * unripe * ungrateful * unfortunate * unilateral * unguent * unfasten * unbutton * unfamiliar * unfailing * union * uncut * undaunted * unaided * unaltered * untamed * unclear * uncaring * uncontrolled
unable
unacceptable
unaccompanied
unachievable
unadventurous
unaffordable
unafraid
unaltered
unambitious
unappetizing
unapproved
unattached
unaware
unbearable
unbeatable
unbelievable
unblemished
unbolt
unbreakable
unbuttoned
uncanny
unceasing
uncertain
unchained
unchanging
uncivilized
unclean
unclimbable
unclip
uncluttered
uncomfortable
uncommon
unconcerned
unconnected
unconscious
uncontaminated
unconvinced
uncovered
undecided
undeniable
undeserved
undesirable
undrinkable
unemployed
uneven
unexpected
unfashionable
unfasten
unfinished
unforgettable
unglued
ungoverned
unhappiness
unhappy
unhelpful
unhurried
unidentified
unimaginable
unintentional
unjust
unknown
unkind
unloading
unlucky
unmatched
unmanned
unmusical
unnatural
unnoticed
unobserved
unoccupied
unpack
unpleasant
unplug
unprecedented
unpredictable
unprintable
unproductive
unqualified
unreal
unreasonable
unreliable
unripe
unruly
unsafe
unscrew
unsettled
unskilled
unspoiled
unsuited
unsurprising
unsweetened
unthinkable
untidy
untitled
untruthful
unusual
unusable
unvaried
unwanted
unwell
unwilling
unwind
unzipped
I'm sure there are many others. That's a decent list for now. Please feel free to improve this answer.
Some words that use the prefix 'un' are:unableunbelievableunconsciousundeniableunendingunfurledungainlyunholyunimaginableunjustunknownunlovedunmeritedunnoticedunownedunprovenunquietunrestunsinkableuntidyunusedunvariedunwantedunexplained (OK, so I cheated a little)unyieldingunzip
unfit & unable
Some words that start with a short U sound are up, us, under, and umpire.
unbelievable, unusual, unnatural, uneven, unwarranted
Unknowable is one. UN and ABLE.
Words with prefix un include unhappy, unsanitary, unwell, undone, uncompromising, unbelievable, unsettling, unassuming, unimaginative, unsaid... Many adjectives can be formed by adding the prefix un- to another adjective (that does not have a prefix already).
unbelievable, unusual, unnatural, uneven, unwarranted
some words are unhappy, disapprove,dislike,unlock,reconstruct,redo,replace,unpaid,disorder,rebuild,restart,unload,repeat,disappear unlikely,unequal,reverse,undo. i hope this helped you.
unfit
No, "un-" is a prefix that is added to words to indicate a negation or reversal of the word's meaning. "Unbelievable" is a word itself, formed by adding the prefix "un-" to "believable."
The prefix of "sign" is "un-" and the suffix is "-ed."
un is the prefix of familiar so there is no prefix for an already prefixed word