IPA: /ɪnˈdɪstɪŋkt.nəs/
KK: /ɪnˈdɪstɪŋktnəs/
The quality of being unclear or not easily seen or heard.
The indistinctness of the sound made it hard to understand what was being said.
Indistinctness → It is formed from "in-" (meaning not) and "distinct" (from Latin "distinctus", meaning separated or distinguished) and the suffix "-ness" (meaning the state or quality of). The word "indistinctness" refers to the quality of being not clear or not easily distinguished.
Think of 'not' ('in-') and 'clear' ('distinct') to remember that 'indistinctness' means the quality of being unclear.