Breakdown of Zwecks sicheren Trinkwassers kochen wir das Wasser aus dem Fluss ab.
aus
from / out of (made of)
das Wasser
the water
wir
we
sicher
sure / certain
der Fluss
the river
zwecks
for the purpose of
das Trinkwasser
the drinking water
abkochen
to boil
Questions & Answers about Zwecks sicheren Trinkwassers kochen wir das Wasser aus dem Fluss ab.
Why is the adjective ending -en in sicheren Trinkwassers if there is no article? Shouldn't it be -es for a neuter genitive noun?
This is a tricky exception in German adjective declension! Normally, without an article, an adjective takes the "strong" ending to show the case (which would be -es for masculine/neuter genitive). However, because the noun already clearly shows the genitive case with its own -s ending (Trinkwassers), the adjective takes the "weak" ending -en instead. This prevents an awkward double "-s" sound.
How is the preposition zwecks different from using um ... zu?
Both express purpose, but they are used with different grammatical structures. Zwecks is a preposition, so it must be followed directly by a noun phrase in the genitive case (like sicheren Trinkwassers). Um ... zu is a conjunction used with an infinitive verb clause (e.g., Um sicheres Trinkwasser zu haben...). Zwecks is very efficient but sounds a bit formal or technical.
What is the difference between kochen and abkochen?
Kochen is the general verb for "to cook" or "to boil". Adding the separable prefix ab- changes the meaning specifically to "to sterilize by boiling". You use abkochen when you are boiling water, milk, or equipment to kill bacteria and make it safe.
Why is the verb kochen placed before the subject wir?
This is due to the strict "Verb Second" (V2) rule in German main clauses. The entire prepositional phrase Zwecks sicheren Trinkwassers occupies position 1 in the sentence. Therefore, the conjugated verb (kochen) must take position 2, pushing the subject (wir) into position 3.
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