Vocabulary: Grudge

GRUDGE
Resentment, a feeling of resentment or ill will, especially one lasting for a long time. (noun), Accept or admit unwillingly (verb)
If you have or bear a grudge against someone, you have unfriendly feelings towards them because of something they did in the past.
BOTTLE UP
To contain, hold, or entrap something or somebody, especially a group of people or to conceal or repress strong feelings
Examples:
1.She just burst into tears because of all the resentment she's been BOTTLING UP for years.
2.The young woman BOTTLED UP her feelings for an older man.
3.The manager of the company BOTTLED UP all the employees for a quick meeting.
4.I used to BOTTLE UP my anger when I was a kid.
5.It's not good to BOTTLE UP your feelings for the person you love.

BAD TEMPER
There once was a little boy who had a bad temper. His father gave him a bag of nails and told him that every time he lost his temper, he must hammer a nail into the back of the fence.
The first day, the boy had driven 37 nails into the fence. Over the next few weeks, as he learned to control his anger, the number of nails hammered daily gradually dwindled down. He discovered it was easier to hold his temper than to drive those nails into the fence.
Finally the day came when the boy didn't lose his temper at all. He told his father about it and the father suggested that the boy now pull out one nail for each day that he was able to hold his temper. The days passed and the boy was finally able to tell his father that all the nails were gone.
The father took his son by the hand and led him to the fence. He said, "You have done well, my son, but look at the holes in the fence. The fence will never be the same. When you say things in anger, they leave a scar just like this one. You can put a knife in a man and draw it out. It won't matter how many times you say I'm sorry the wound is still there. A verbal wound is as bad as a physical one."