greatest worry
noun phraseUK /ˈɡreɪtɪst ˈwʌri/
US /ˈɡreɪtɪst ˈwɜːri/
The thing that makes you feel the most scared or upset.
Her greatest worry was that she would forget her lines on stage.
OTHER MEANINGS
2. The problem that bothers you more than any other.
His greatest worry was finding enough money for school.
3. The thing a person thinks about most with unease.
For the coach, the greatest worry was the team's slow defense.
4. A strong feeling of nervousness about the most important thing.
My greatest worry before the trip was missing the plane.