un-

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Prefix

1. (added to adjectives or past participles) not

   unannounced — “not being announced”

   uneducated — “not educated”

   unattractive — “not attractive”

   unconstitutional — “not constitutional”

2. (added to nouns) absent; lacking; not; negative

   ungrace

   unrest

   unhope

   unfriend

   unrepair

   unluck

   unnova

   uncertainty

   unconformity

3. (added to nouns) contrary to or contrasted against traditional norms; unconventional; alternative

   unconference

   unmethod

Translations

• French: in-, mal, non-
• German: un-
• Italian: in-
• Portuguese: in-
• Russian: не-
• Spanish: in-

Translations

• French: in-, non-
• German: un-
• Portuguese: in-, des-
• Russian: без-
• Spanish: in-

Translations

• French: anti-, in-, non-
• German: un-
• Portuguese: in-, anti-, não-
• Russian: не-
• Spanish: in-

Prefix

1. (added to verbs and nouns to form verbs) reverse, opposite

   to undress — “to take one's clothes off”

   to unwind — “to reverse a winding”

   to unlock — “to undo the locking of”

   • 1996, Diane Warren (writer), Toni Braxton (singer), “Un-Break My Heart”, Secrets, LaFace

     Un-cry these tears I cried so many nights / Un-break my heart

2. release, free, remove, extract.

   to uncage — “to release from a cage”

   to untangle — “to remove the tangling of”

Synonyms

• (opposite) anti-, in-, non-
• (release) de-, dis-, off-

Translations

• French: dé-, dés-
• German: ent-
• Italian: s-
• Spanish: des-

Prefix

1. Used to form temporary names of elements (such as unbiunium) whose existence has been predicted, and have not yet been given a trivial name.
2. Used to form large numbers as the first in the sequence.

   undecillion

   unvigintillion

   untrigintillion

Synonyms

• -un-

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