IPA: //ʌnˈskɪl.fəl.nəs//
KK: /ʌnˈskɪl.fəl.nəs/
The condition of not having the ability or skill to do something well.
His unskillfulness in playing the piano was evident during the performance.
Unskillfulness → It is formed from "un-" (meaning not) and "skill" (from Old Norse *skil*, meaning to discern or understand) and "-fulness" (meaning the state of being full of). The word "unskillfulness" means the state of not being skilled or lacking skill.
Think of 'not' ('un-') being combined with 'skill' — which means the ability to do something well — and '-fulness' indicating a state. This helps you remember that unskillfulness refers to the state of lacking skill.