The correct spelling of "acknowledge" is spelled A-C-K-N-O-W-L-E-D-G-E. This is an English word with Middle English origins, and it means to recognize, admit, or accept something. It can be used as both a verb and a noun. For example, you might say, "I acknowledge that you worked hard on this project," or, "Your hard work was an acknowledgement of your dedication to this project."