IPA: /ˌʌn.əkˈnɒl.ɪdʒd/
KK: /ʌnəkˈnɑːlɪdʒd/
Not recognized or accepted by others; something that has not been acknowledged or admitted.
His contributions to the project remained unacknowledged by the team.
Unacknowledged → It is formed from "un-" (meaning not) and "acknowledge" (from Old English *oncnawan*, meaning to recognize or admit). The word "unacknowledged" means not recognized or admitted.
Think of 'not' ('un-') recognizing or admitting something ('acknowledge'). This helps you remember that unacknowledged means something that is not recognized.