IPA: /ʌnˈpʌŋkʧuəl/
KK: /ʌnˈpʌŋkʧuəl/
Not arriving or happening at the expected or scheduled time.
He is often unpunctual for meetings, which frustrates his colleagues.
Unpunctual → It is formed from "un-" (meaning not) and "punctual" (from Latin "punctualis", meaning pertaining to a point in time). The word "unpunctual" means not being on time or not adhering to a scheduled point in time.
Think of 'not' ('un-') being added to 'on time' ('punctual') — that's why unpunctual means not being on time.