IPA: /ʌnˈkɒmpaʊnd/
KK: /ʌnˈkɑmpaʊnd/
Not made up of multiple parts or elements; simple or singular in form.
The term 'uncompounded' refers to a word that is not formed from two or more other words.
Uncompounded → It is formed from "un-" (meaning not) and "compound" (from Latin "componere", meaning to put together). The word "uncompounded" means not put together or not made of multiple parts.
Think of 'not' ('un-') being added to 'put together' ('componere') — that's why 'uncompounded' means something that is not made of multiple parts.