IPA: //əkˈnɒlɪdʒmənt//
KK: /ækˈnɑːlɪdʒmənt/
A noun that refers to the act of recognizing or admitting something, often as a response or expression of gratitude. It can also mean a formal statement that confirms or validates something.
She received an acknowledgment for her contributions to the project.
Acknowledgment is formed from "acknowledge" (from Old English "oncnawan", meaning to recognize or admit) and the suffix "-ment" (meaning the action or result of). The word "acknowledgment" refers to the action or result of recognizing or admitting something.
Think of 'recognizing' something ('oncnawan') and the action of doing so ('-ment') — that's why acknowledgment means recognizing or admitting something.