IPA: /ˌʌn.dɪˈtɜːr.mɪnd/
KK: /ʌnˈdɪr.mɪnd/
Not known or decided yet; something that has not been established or clarified.
The cause of the accident is still undetermined.
Undetermined → It is formed from "un-" (meaning not) and "determinare" (from Latin, meaning to limit or define). The word "undetermined" means not limited or defined, indicating uncertainty or lack of resolution.
Think of 'not' ('un-') having a 'limit' or 'definition' ('determinare') — that's why undetermined means something that is not clearly defined.