IPA: //ʌnˈpræktɪkəl//
KK: /ʌnˈpræktɪkəl/
Not suitable for practical use or not effective in real situations.
The plan was deemed unpractical and was quickly rejected by the team.
Unpractical → It is formed from "un-" (meaning not) and "practical" (from Latin "practicus", meaning effective or suitable for actual use). The word "unpractical" means not suitable for practical use or not effective in real situations.
Think of 'not' ('un-') being added to 'effective' ('practicus') to remember that 'unpractical' describes something that is not effective or suitable for real-life situations.