'Grievous' in the Bible

"Behold, there is with you Shimei the son of Gera, the Benjamite, of Bahurim, who cursed me with a grievous curse in the day when I went to Mahanaim; but he came down to meet me at the Jordan, and I swore to him by Yahweh, saying, 'I will not put you to death with the sword.'

"Your father made our yoke grievous: now therefore make you the grievous service of your father, and his heavy yoke which he put on us, lighter, and we will serve you."