IPA: /ɪnˈɛksɛk.nəs/
KK: /ɪnˈɛksɛktnəs/
The quality of not being precise or accurate; it refers to a lack of exactness or certainty.
The inexactness of the measurements led to errors in the final results.
Inexactness → It is formed from "in-" (meaning not) and "exact" (from Latin "exactus", meaning precise or accurate) and the suffix "-ness" (meaning the state of being). The word "inexactness" refers to the state of not being precise or accurate.
Think of 'not' ('in-') being combined with 'precise' ('exact') to remember that 'inexactness' means the state of being not precise.