IPA: /ʌnˈwiːldɪnəs/
KK: /ʌnˈwiːldɪnəs/
The quality of being difficult to handle or manage because of size, shape, or complexity.
The unwieldiness of the large package made it hard to carry up the stairs.
Unwieldiness → It is formed from "un-" (meaning not), "wield" (from Old English "wieldan", meaning to handle or control), and "-iness" (a suffix indicating a state or quality). The word "unwieldiness" refers to the quality of being difficult to handle or manage.
Think of 'not being able to handle' ('un-') something effectively, which is what unwieldiness means.