The Bible describes "word curses" as the destructive power of human speech, where words intended to harm, belittle, or invoke evil with examples in both the Old Testament (like Shimei's cursing of David in 2 Samuel 16) or Jon’s wife (Job 2:9). You can break agreements with such words, and speaking life instead, as seen in Proverbs 18:21 ("Death and life are in the power of the tongue"). James 3 describes the tongue as a "restless evil, full of deadly poison," capable of cursing people made in Go