IPA: /ɪˈrɛl.ə.vən.si/
KK: /ɪˈrɛl ə vən si/
The state of being not related or important to something.
The irrelevancy of his comments made it hard to focus on the main topic.
Irrelevancy → It is formed from "ir-" (meaning not) and "relevare" (meaning to lift up or raise). The suffix "-ancy" indicates a state or quality. Thus, "irrelevancy" refers to the state of not being relevant or not being lifted up in importance.
Think of 'not' ('ir-') and 'lifting up' ('relevare') to remember that 'irrelevancy' means something that is not important or significant.