Dis- (not, opposite)
Dis-
Not; the opposite of; undo.
The two friends disagreed about the best dosa in Chennai.
Disagree
To have a different opinion.
Kabir and Sana disagree about which team will win.
Dissatisfied
Not pleased with something.
Priya was dissatisfied with her first drawing, so she began again.
Remember: Just add dis- to the word: dis + satisfied = dissatisfied (double s), dis + appear = disappear (one s). Never add or drop a letter.