hahaha read the Bible bro. You dont understand that gnashing is used with two meanings in any places. You just stepped in your own words.

Gnashing one’s teeth shows up elsewhere in Scripture in contexts other than feeling pain. In Acts 7:54 the gnashing of teeth is done in anger because of what Stephen had said to the Jewish Council: “They were furious and gnashed their teeth at him.” Psalm 37:12 says, “The wicked plot against the righteous and gnash their teeth at them” (see also Psalm 35:16; 112:10; and Lamentations 2:16). In these passages, wicked persons gnash their teeth at righteous persons as the wicked plot against them or disapprove of them. Apparently, gnashing teeth was a sign of great disrespect and anger.