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1.
1. to have refuted the claim that a specific thing is irrelevant in a case or situation.

based on the word "relevant" meaning to be on topic, the main word here is irrelevant (relevant's antonym), "dis" would mean to refute (or to remove from) when added to a word (refuting is the goal when using this word).
The relevance of the the prosecutor's comment was objected by the defendant, then their claim was refuted by the prosecutor's evidence, in the presents of their dis-irrelevance they stayed there tongue in somber silence.
by masterpackman December 05, 2011