un- — not, opposite of, reversal of an action (affix)
un-
not, opposite of, reversal of an action
Component
prefix
Old English · The most productive English negator; also reverses verbs (untie, undo).
Used in (8)
unusual
A2
/ʌnˈjuːʒ(u)əl/
Not usual or common; different from what you normally see
unknown
A2
/ʌnˈnoʊn/
Not known; not discovered or identified.
unhappy
A2
/ʌnˈhæpi/
Sad; not feeling happy.
unable
B1
/ʌnˈeɪbl̩/
Not able to do something; lacking the power, skill, or means.
unfair
A2
/ʌnˈfɛɚ/
Not fair; not treating people equally or in a just way.
untie
B2
/ʌnˈtaɪ/
To undo something that is tied, such as a knot or laces
unlock
B2
/ʌnˈlɑk/
To open something that is locked, usually with a key or code.
undo
B1
/ʌnˈduː/
To cancel or reverse something that has been done.