IPA: /ˌʌnɪˈdɛntɪfaɪə/
KK: /ʌnˌaɪˈdɛntɪfaɪə/
Something that cannot be identified or named easily.
The object was unidentifiable in the dark.
Unidentifiable → It is formed from "un-" (meaning not) and "identificare" (from Latin, meaning to identify). The word means not able to be identified or recognized.
Think of 'not' ('un-') being added to 'identify' ('identificare') — this helps you remember that 'unidentifiable' means something that cannot be recognized.