Characterized by great atrocity; heinous; aggravated; flagitious; as, a grievous sin
Full of, or expressing, grief; showing great sorrow or affliction; as, a grievous cry
of great gravity or crucial import; requiring serious thought; "grave responsibilities"; "faced a grave decision in a time of crisis"; "a grievous fault"; "heavy matters of state"; "the weighty matters to be discussed at the peace conference"
A grievous injury to your body is one that causes you great pain and suffering. He survived in spite of suffering grievous injuries. + grievously griev·ous·ly Nelson Piquet, three times world champion, was grievously injured. very serious and causing great pain or suffering
causing fear or anxiety by threatening great harm; "a dangerous operation"; "a grave situation"; "a grave illness"; "grievous bodily harm"; "a serious wound"; "a serious turn of events"; "a severe case of pneumonia"; "a life-threatening disease"
causing or marked by grief or anguish; "a grievous loss"; "a grievous cry"; "her sigh was heartbreaking"; "the heartrending words of Rabin's granddaughter"
If you describe something such as a loss as grievous, you mean that it is extremely serious or worrying in its effects. Their loss would be a grievous blow to our engineering industries Mr Morris said the victims had suffered from a very grievous mistake. + grievously griev·ous·ly Birds, sea-life and the coastline all suffered grievously
shockingly brutal or cruel; "murder is an atrocious crime"; "a grievous offense against morality"; "a grievous crime"; "no excess was too monstrous for them to commit"