Questions & Answers about Diese Kleinigkeit macht mich heute fröhlich.
Diese is the nominative feminine singular form of the demonstrative determiner dies-.
- The noun Kleinigkeit is feminine: die Kleinigkeit.
- It is the subject of the sentence, so it must be in the nominative case.
- Therefore you use diese (feminine nominative), not dieser (masc. nom.) or dieses (neuter nom.).
A mini‑paradigm in the nominative:
- dieser Mann (masculine)
- diese Frau (feminine)
- dieses Kind (neuter)
- diese Leute (plural)
Literally, Kleinigkeit is related to klein (“small”), but its meaning is a bit idiomatic:
- It can mean a little thing / trifle / something minor, often something not very important:
- Das ist nur eine Kleinigkeit. – “That’s just a small thing / nothing big.”
- It can also mean a small treat / snack:
- Ich esse nur eine Kleinigkeit. – “I’ll just eat a little something.”
In your sentence, Diese Kleinigkeit usually suggests a small, perhaps insignificant detail or gesture that, despite being small, has a positive emotional effect.