fast
almost
Expresses that something is nearly or approximately the case, but not completely.
Ich bin fast fertig mit meiner Arbeit.
I'm almost finished with my work.

almost
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almost
Expresses that something is nearly or approximately the case, but not completely.
Ich bin fast fertig mit meiner Arbeit.
I'm almost finished with my work.

Careful: 'fast' means 'almost' or 'approximately'. The English word 'fast' (quickly) is 'schnell' in German.
Das Glas ist fast leer.
The glass is almost empty.
'Fast' is often combined with words that describe an endpoint or an extreme, for example 'fast fertig' (almost finished), 'fast voll' (almost full), 'fast immer' (almost always), or 'fast nie' (almost never).
Wir sind fast am Ziel.
We're almost at the destination.
You can combine 'fast' with negative words like 'nichts' (nothing), 'niemand' (nobody), or 'kein' (no/not any) to express that only a very small amount is present.
Im Kühlschrank ist fast nichts mehr.
There is almost nothing left in the fridge.
whole / quite
'ganz' and 'fast' often come before similar words, but they mean the opposite in one important respect. 'ganz' means that something is completely the case. 'fast' means that something is almost the case, but not quite. Learners easily confuse them because both have to do with completeness. The difference is very important in practice: 'ganz fertig' means finished; 'fast fertig' means not finished yet.

Ich bin fast fertig, ich brauche nur noch fünf Minuten.
I'm almost finished; I just need five more minutes.
Nach zwei Stunden war der Bericht ganz fertig.
After two hours, the report was completely finished.