Used for strong negation and means 'überhaupt nicht' (not at all) or 'in keiner Weise' (in no way). The spelling 'gar nicht' is correct according to current German orthography, but the one-word spelling is common in colloquial usage.
example
Ich kann das garnicht glauben!
I can't believe that at all!
Usage tips
Spelling
Although the one-word spelling 'garnicht' is very widespread, according to official German spelling only the separate spelling 'gar nicht' is considered correct. In informal communication such as chats, the combined form is often tolerated.
EXAMPLE
Das ist gar nicht so einfach, wie ich dachte.
That is not at all as easy as I thought.
Strong negation
'Gar nicht' (not at all) is an intensification of the negation 'nicht' (not). It expresses that something is absolutely not the case or in no way the case.
EXAMPLE
Ich habe heute gar keine Zeit.
I have no time at all today.
Sentence position
The word group 'gar nicht' (not at all) normally stands directly before the part of the sentence that it negates. This can be an adjective, an adverb, or another part of the sentence.
EXAMPLE
Der Film war gar nicht langweilig.
The film was not at all boring.
Compare with
near_synonym
garnicht vs keineswegs
by no means
'keineswegs' and 'garnicht' both express strong negation. In meaning, they are very close: both can mean that something is not true at all. The difference is mainly in style and spelling. 'keineswegs' sounds more formal and emphasizes a clear rejection. With 'garnicht', the correct spelling is 'gar nicht'; it sounds more natural and simpler in everyday language. So in written German, you should write 'gar nicht'.
garnicht
Wir haben gar nicht bemerkt, dass der Termin verschoben wurde.
We didn't notice at all that the appointment had been postponed.
keineswegs
Sein Vorschlag ist keineswegs schlecht, aber wir müssen ihn noch prüfen.
His suggestion is by no means bad, but we still need to review it.