(charah, ma'ar): To "fret" is from for (prefix) and etan, "to eat," "to consume." The word is both transitive and intransitive in King James Version: (1) transitive as translation of charah, "to burn," Hithpael, "to fret one's self," "to be angry" (Ps 37:1, "Fret not thyself because of evil-doers"; ...