suffering from a fever:
She lay in bed, too feverish to sleep.
There was a feverish blush to his cheeks.
very excited or worried about something:
They waited in a state of feverish anxiety for their mother to come home.
The show was about to begin and backstage there were signs of feverish activity (=activity that is done very quickly because there is not much time).
Congress is working feverishly to pass the bill.