Keywords: worry, anxiety, concern, fret, worried, anxious, concerned, fretful
As a Noun
Thoughts or constant thinking about a problem that you have or about something unpleasant that might happen and the feeling of unhappiness and unease that this causes. English = worry, anxiety, concern.
As a Verb or Adjective
To keep thinking about a problem or about something unpleasant that might happen. English = worry, fret; (be) worried, (be) anxious, (be) concerned, (be) fretful.