gravely in WordNet English dictionary

1. to a severe or serious degree
   "fingers so badly frozen they had to be amputated"; "badly injured"; "a severely impaired heart"; "is gravely ill"; "was seriously ill"
   badly  severely  gravely  seriously  badly  severely  gravely  seriously 
   
2. in a grave and sober manner
   "he walked soberly toward the altar"
   gravely  soberly  staidly  gravely  soberly  staidly