unusable
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unusable
Not usable or useful for the intended purpose; defective, unsuitable, or worthless.
Das alte Handy ist nach dem Sturz ins Wasser völlig unbrauchbar.
The old phone is completely unusable after falling into the water.
The word is built simply: the prefix 'un-' negates the adjective 'brauchbar' (usable). 'Brauchbar' in turn derives from the verb 'brauchen' (to need/use) and means 'useful' or 'usable'.
Diese alten Batterien sind leider unbrauchbar.
These old batteries are unfortunately unusable.
To specify what something or someone is unsuitable for, the preposition 'für' (for) followed by the accusative is used. The structure is: unbrauchbar für + noun.
Diese dünne Jacke ist für eine Winterwanderung unbrauchbar.
This thin jacket is unusable for a winter hike.
To express that something has no use at all, 'unbrauchbar' (unusable) is often intensified with adverbs such as 'völlig' (completely), 'komplett' (completely), or 'total' (totally).
Ohne die fehlende Schraube ist das ganze Regal komplett unbrauchbar.
Without the missing screw, the whole shelf is completely unusable.
When 'unbrauchbar' (unusable/useless) is applied to a person, it is a very strong and derogatory statement. It is perceived as insulting and should be used only with great caution.
Sein Chef nannte ihn vor allen Kollegen unbrauchbar.
His boss called him useless in front of all his colleagues.
broken / exhausted
'kaputt' and 'unbrauchbar' can both mean that something can no longer be used. The difference lies in the reason and the perspective. 'kaputt' usually says that something is broken, shattered, or damaged. 'unbrauchbar' says that something is not useful or not suitable for a particular purpose. It does not necessarily have to be broken. A chair can be 'kaputt' because a leg is missing; a text can be 'unbrauchbar' because it does not fit the topic. For people, 'kaputt' is colloquial for very tired, but 'unbrauchbar' means more like incapable or unsuitable and sounds harsh.
Der erste Entwurf ist unbrauchbar, weil wichtige Informationen fehlen.
The first draft is unusable because important information is missing.
Beim Einkaufen ist die Tüte kaputt gegangen, und die Äpfel lagen auf dem Boden.
While shopping, the bag broke, and the apples ended up on the floor.