die Nebensache
Translation
secondary matter, minor issue, side issue, triviality
Examples
Das Geld ist nur eine Nebensache.
The money is just a secondary matter.
Im Moment ist die Arbeit für ihn Nebensache.
At the moment, work is a secondary matter for him.
Grammar Patterns
sth. is (just) a secondary matter (etwas ist (nur) eine Nebensache) For her, her career is just a secondary matter.
Similar Words
Synonyms: die Belanglosigkeit (triviality), die Kleinigkeit (trifle); Antonyms: die Hauptsache (the main thing), die Priorität (priority)
Etymology
From 'neben' (secondary/minor) + 'Sache' (thing/matter). Literally a 'side matter'.
Memory Tips
This is the opposite of 'Hauptsache' (main thing). A 'Sache' (matter) that is just 'neben' (on the side) is not the main focus.