IPA: /ʌnˈwɜːrkəˌbɪləti/
KK: /ʌnˈwɜrkəˌbɪlɪti/
The quality of being impossible to work or function effectively; a situation or condition that cannot be successfully implemented or used.
The unworkability of the plan led to its rejection by the committee.
Unworkability → It is formed from "un-" (meaning not), "work" (from Old English "weorc", meaning labor or effort), and "-ability" (from Latin "abilitas", meaning capability). The word describes the state of not being capable of being worked or not feasible.
Think of 'not' ('un-') being combined with 'work' ('weorc') and 'capability' ('-ability') — this helps you remember that 'unworkability' means something that cannot be worked or is not feasible.