'Grievous' in the Bible

"Look! These women were the same ones who were counseled by Balaam to cause the Israelis to commit a grievous sin against the LORD at Peor. As a result, that plague infected the LORD's community.

a man to whom God gives wealth, riches, and honor, so that he lacks none of his heart's desires but God does not give him the capability to enjoy them. Instead, a stranger consumes them. This is pointless and a grievous affliction.