keyworry
nounUK /ˈkiːwʌri/
US /ˈkiːwɜːri/
A keyworry is a small worry that keeps bothering you.
She had a keyworry about forgetting her lunch, so she checked her bag twice.
OTHER MEANINGS
2. A worry that feels like it is the most important one.
His keyworry was being late for the school bus.
3. A worry that keeps coming back again and again.
The keyworry about the test stayed with him all week.
4. A worry that is hard to stop thinking about.
Her keyworry about the dark made bedtime tricky.