Dis- means not, none

disadvantage (n) - an unfavorable situation that is not good

disagreement (n) - a quarrel; not able to come to an agreement; not of the same opinion

disappoint (v) - to let someone down; to not make someone proud or satisfied

discontinue (v) - to end something; to not use anymore; cease

dismal (adj) - not good; depressing; dreary; bleak

disobedient (adj) - not following the rules

disorganized (adj) - messy; not neat; not able to find things

disposable (adj) - not worthy of being kept; easily given or thrown away; able to be easily replaced

disrespectful (adj) - not polite; rude; not courteous

disturb (v) - to bother or pester; not leaving someone alone