Harrowing
Part of speech: verb
Definition: To drag a harrow over; to break up with a harrow.
Part of speech: adjective
Definition: Causing pain or distress.
Example sentence: Well, I stopped drinking. That was actually a big deal. I didn't go through any harrowing rock-bottom experience. I just made a decision to stop drinking.
Agonizing
Part of speech: verb
Definition: To writhe with agony; to suffer violent anguish.