IPA: /ˌɪndɪˈtɜːrmɪnəsi/
KK: /ˌɪndɪˈtɜːrmɪnəsi/
The condition of not being clearly defined or determined; uncertainty about something.
The indeterminacy of the results made it difficult to draw any conclusions.
Indeterminacy is formed from "in-" (meaning not) and "determinare" (from Latin, meaning to limit or define) and the suffix "-cy" (meaning the state or condition of). The word refers to the state of being not clearly defined or limited.
Think of 'not' ('in-') clearly 'defining' something ('determinare') — that's why indeterminacy means the state of being unclear or undefined.