Definition:

 
1. To be angry
 
2. To bore a hole inwards  

Leviticus 13:55 And the priest shall look on the plague, after that it is washed: and, behold, if the plague have not changed his colour, and the plague be not spread; it is unclean; thou shalt burn it in the fire; it is fret inward, whether it be bare within or without.  
1 Samuel 1:6 And her adversary also provoked her sore, for to make her fret , because the LORD had shut up her womb.  
Psalm 37:1 A Psalm of David. Fret not thyself because of evildoers, neither be thou envious against the workers of iniquity.  
Psalm 37:7 Rest in the LORD, and wait patiently for him: fret not thyself because of him who prospereth in his way, because of the man who bringeth wicked devices to pass.  
Psalm 37:8 Cease from anger, and forsake wrath: fret not thyself in any wise to do evil.  
Proverbs 24:19 Fret not thyself because of evil men, neither be thou envious at the wicked;  
Isaiah 8:21 And they shall pass through it, hardly bestead and hungry: and it shall come to pass, that when they shall be hungry, they shall fret themselves, and curse their king and their God, and look upward.