
verbraucht
used up
Completely used up or consumed, so that none of it is left.
Die Milch ist verbraucht, du musst neue kaufen.
The milk is used up; you need to buy more.
used up / exhausted
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used up
Completely used up or consumed, so that none of it is left.
Die Milch ist verbraucht, du musst neue kaufen.
The milk is used up; you need to buy more.

exhausted
Refers to a person who is tired, worn out, and without energy.
Nach der langen Wanderung fühlte sie sich total verbraucht.
After the long hike, she felt totally exhausted.

stale
Refers to air in an enclosed room that is no longer fresh.
Mach mal das Fenster auf, die Luft hier drin ist ganz verbraucht.
Open the window for a moment; the air in here is really stale.
'Verbraucht' (used up) is the past participle of the verb 'verbrauchen' (to use up/consume). The prefix 'ver-' here indicates that something has been completely used to the end.
Das gesamte Budget für dieses Jahr ist bereits verbraucht.
The entire budget for this year has already been used up.
The context shows the meaning: if 'verbraucht' (used up) refers to a thing, it is empty or used up. If it refers to a person, the person is exhausted. If it refers to air, it is no longer fresh.
Das Papier im Drucker ist verbraucht.
The paper in the printer is used up.
When a person is meant, 'verbraucht' (exhausted) is often combined with verbs such as 'sich fühlen' (to feel), 'aussehen' (to look), or 'wirken' (to seem/appear).
Er sah nach der Krankheit sehr verbraucht aus.
He looked very exhausted after the illness.
all
All and verbraucht can both mean that nothing is left of a supply. All is used in this sense only colloquially and not everywhere. Verbraucht is standard language and explicitly describes a supply that has been used up through use.

Unser Heizöl ist schon vollständig verbraucht.
Our heating oil has already been completely used up.
Unser Heizöl ist schon alle.
Our heating oil is already all gone.