Question 1

I thought nouns ending in -nis were neuter, like das Ergebnis. Why does this sentence use the feminine diese for Erkenntnis?

Accepted Answer

While most nouns ending in the suffix -nis are indeed neuter (like das Geheimnis or das Zeugnis), there is a small group of important exceptions that are feminine. Die Erkenntnis (the insight) is one of them. Other common feminine exceptions you will encounter are die Erlaubnis (permission), die Kenntnis (knowledge), and die Finsternis (darkness).

Question 2

How do I form the plural if I want to say "These insights are very valuable"?

Accepted Answer

Even though its gender is an exception to the neuter rule, its plural follows the exact same predictable pattern as all other -nis nouns: you double the final s and add -e. The plural is die Erkenntnisse. The full plural sentence would be: Diese Erkenntnisse sind sehr wertvoll.

Question 3

Is Erkenntnis related to the verb erkennen?

Accepted Answer

Yes, the suffix -nis is often added to a verb stem to create an abstract noun that represents the result of the verb's action. The verb erkennen means to realize, recognize, or discern. Therefore, die Erkenntnis is the result of that process: a realization or an insight.

Question 4

Can I use the suffix -voll in wertvoll to figure out other German adjectives?

Accepted Answer

Absolutely. The word wertvoll combines der Wert (value) with the suffix -voll (full of), literally meaning "full of value." It works much like the English suffix "-ful." You will see this in many B2-level words, such as sinnvoll (meaningful or sensible) or anspruchsvoll (demanding).

Diese Erkenntnis ist sehr wertvoll.

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