IPA: /ʌnˌpʌŋk.tʃuˈæl.ɪ.ti/
KK: /ʌnˌpʌŋk.tʃuˈæl.ɪ.ti/
The condition of not being on time or being late.
Her unpunctuality caused her to miss the beginning of the meeting.
Unpunctuality → It is formed from "un-" (meaning not), "punctual" (from Latin "punctualis", meaning pertaining to a point in time), and "-ity" (meaning the state or quality of). The word "unpunctuality" refers to the state of not being on time or being late.
Think of 'not' ('un-') being 'on time' ('punctual') — that's why unpunctuality means the state of being late.