IPA: /ɪˈrɛl.ə.vəns/
KK: /ɪˈrɛl ə vəns/
The state of not being connected or related to the topic or issue at hand.
The irrelevance of his comments made it difficult to follow the discussion.
Irrelevance → It is formed from "in-" (meaning not) and "relevare" (meaning to lift up or raise). The word describes something that is not raised up or not pertinent to the matter at hand.
Think of something that is 'not' ('in-') 'lifted up' or 'raised' ('relevare') in importance — that's why irrelevance means it doesn't matter.