Read the dictionary definition of grievous. All definitions for this word.
1. causing fear or anxiety by threatening great harm
1. a dangerous operation
2. a grave situation
3. a grave illness
4. grievous bodily harm
5. a serious wound
6. a serious turn of events
7. a severe case of pneumonia
8. a life-threatening disease
2. shockingly brutal or cruel
1. murder is an atrocious crime
2. a grievous offense against morality
3. a grievous crime
4. no excess was too monstrous for them to commit
3. of great gravity or crucial import; requiring serious thought
1. grave responsibilities
2. faced a grave decision in a time of crisis
3. a grievous fault
4. heavy matters of state
5. the weighty matters to be discussed at the peace conference
4. causing or marked by grief or anguish
1. a grievous loss
2. a grievous cry
3. her sigh was heartbreaking
4. the heartrending words of Rabin's granddaughter