griev·ous 
/ˈgri:vəs/ adjective
/ˈgri:vəs/ adjective [more grievous; most grievous] formal : causing great sadness, suffering, or pain : very serious or severe
▪ the grievous cost of war ▪ He took a foolish financial risk and suffered a grievous loss. ▪ grievous bodily harm ▪ a grievous error/mistake
▪ the grievous cost of war ▪ He took a foolish financial risk and suffered a grievous loss. ▪ grievous bodily harm ▪ a grievous error/mistake
— griev·ous·ly adverb
▪ Several passengers were grievously injured in the bus accident.
▪ Several passengers were grievously injured in the bus accident.
