Dictionary.net

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"

causing or marked by grief or anguish; "a grievous loss"; "a grievous cry"; "her sigh was heartbreaking"; "the heartrending words of Rabin's granddaughter"

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"

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"

causing or marked by grief or anguish; "a grievous loss"; "a grievous cry"; "her sigh was heartbreaking"; "the heartrending words of Rabin's granddaughter"

Causing grief or sorrow; painful; afflictive; hard to bear; offensive; harmful.

Characterized by great atrocity; heinous; aggravated; flagitious; as, a grievous sin.

Causing grief or sorrow; painful; afflictive; hard to bear; offensive; harmful.

Characterized by great atrocity; heinous; aggravated; flagitious; as, a grievous sin.

Causing sadness or sorrow; hard to be borne; painful; oppressive; pitiable; harmful; vexatious.

Grievously.

Grievousness.

Grievously.

Grievousness.

Causing grief or injury; harmful; distressing; severe.

Grievousness.

Causing or full of grief: burdensome: painful: heinous: atrocious: hurtful.

Afflictive; painful; heinous.

Causing grief or pain; burdensome; hard to be borne; heinous; serious; full of complaint; hurtful.

Hard to be borne; burdensome; distressing.

Afflictive, painful, hard to be born; such as causes sorrow; atrocious, heavy.