IPA: //ʌnˈleɪbld//
KK: /ʌnˈleɪbld/
Not marked with a label or identification.
The boxes were unlabeled, making it difficult to find what I needed.
Unlabeled → It is formed from "un-" (meaning not) and "labeled" (from the root "label" which comes from Old French *label*, meaning a small note or tag). The word "unlabeled" means not having a label or tag attached to it.
Think of 'not' ('un-') having a 'tag' or 'note' ('label') — that's why unlabeled means something that does not have a tag.