dis- (Noun) — God of the underworld; counterpart of Greek Pluto.
dis- (Verb) — Criticize harshly.
dis- (Verb) — Treat, mention, or speak to rudely. ex. "the student who had betrayed his classmate was dissed by everyone"
dis- (Prefix) — Not.
dis- (Prefix) — Undo, reverse, do the opposite.