seriousHer condition is not thought to be serious.
badHe got a bad case of food poisoning.
bigOnline fraud is a big problem.
majorIt's not a major problem, but it does need to be taken care of.
severeHe suffered severe damage to his right ankle during the opening match of the season.
life-threateningHis injuries are not thought to be life-threatening.
grievousformalHer death is a grievous loss to the whole of the community.
urgentSuddenly, protecting the public from dangerous chemicals became an urgent matter.