dispa-rage can be read as display a rage. When you display your RAGE on your juniors you BELITTLE them in front of the others.
dis-opposite, parage-praise so if u don't praise 4 someone u criticize him.
disparage~discourage : when you give negetive comments/opinions about the effort put by people around you they get DISCOURAGED!
26th janury ki parade ke background mein kisine disco ka music chala diya and that led to everyone's disparade
we DISPARAGE a 10-paisa coin
we know Disparity=inequality or difference in some respect... same Disparage=belittle someone..