Translation of "Grievous" in Japanese

You know Grievous Bodily Harm? Just how bad do the injuries have to be before it counts as Grievous?

傷害罪ってどの程度の怪我を負わせると傷害罪に問われますか？

Mr T (19 years old) avoided conviction for murder, but was found guilty of grievous bodily harm for having intentionally caused wounds.

T氏19歳は殺人罪は免れたが、意図的に傷を負わせたとして、傷害罪を宣告された。