IPA: //ʌnˈfruːt.fəl.nəs//
KK: /ʌnˈfrutfəlnəs/
The condition of not producing any fruit or results; a lack of productivity or success.
The unfruitfulness of the project led to its cancellation after just one year.
Unfruitfulness → It is formed from "un-" (meaning not) and "fruit" (from Latin "fructus", meaning produce or yield) and "-fulness" (meaning the state of being full of). The word "unfruitfulness" means the state of not being full of produce or yield, indicating a lack of productivity or results.
Think of 'not' ('un-') being applied to 'produce' ('fructus') and the state of being 'full' ('-fulness'). This helps you remember that unfruitfulness refers to a lack of productivity or yield.