IPA: /ˌʌn.dɪsˈkʌst/
KK: /ʌnˈdɪsˌkʌst/
Something that has not been talked about or considered in a conversation or discussion.
The issue remained undiscussed during the meeting, leaving many questions unanswered.
Undiscussed → It is formed from "un-" (meaning not) and "discuss" (from Latin "discutere", meaning to shake apart or examine). The word "undiscussed" means not examined or talked about.
Think of 'not' ('un-') having a conversation or 'examining' ('discuss') something — that's why undiscussed means it hasn't been talked about.