IPA: /ˌɪn.sɪɡˈnɪf.ɪ.kən.si/
KK: /ɪnˌsɪɡnɪˈfɪkənsi/
The quality of being unimportant or not having any value.
The insignificancy of the issue made it easy to overlook during the meeting.
Insignificancy is formed from "in-" (meaning not) and "significare" (meaning to signify or indicate) combined with the suffix "-ancy" (indicating a state or quality). The word refers to the state of not signifying or being of little importance.
Think of 'not' ('in-') signifying anything important ('significare') — that's why insignificancy means a lack of significance.