The injured hiker was gravely hurt in the accident and had to be airlifted to the hospital. (#serious injury) The company's financial situation is gravely concerning, and the board of directors is trying to come up with a plan to save it. (#serious concern) The patient's condition is gravely worsened by the infection, and the doctor is discussing the possibility of amputation. (#serious deterioration) The legacy of the ancient civilization was gravely damaged during the war, leaving only a few fragmented ruins behind. (#serious destruction) The team is gravely disappointed with the outcome of the game, but they're still determined to improve their performance for the next match. (#serious disappointment)