worry
US /ˈwɝː.i/
UK /ˈwɝː.i/

1.
feel or cause to feel anxious or troubled about actual or potential problems
:
•
Don't worry about a thing; everything will be fine.
•
His health problems began to worry his family.
1.
a state of anxiety and concern
:
•
She was filled with worry about her son's safety.
•
His constant worry was affecting his sleep.