Acknowledging someone or something can mean giving recognition or praise. The opposite of that is disacknowledge. Disacknowledging someone or something shows disregard or neglect. Antonyms for disacknowledge include acknowledge, recognize, admit, appreciate, and validate. These words have positive connotations of accepting or respecting someone or something. To disacknowledge can lead to a feeling of rejection, disrespect, or disapproval. Acknowledging someone or their opinion can indicate that they have been heard and understood. The use of positive antonyms for disacknowledge can help build better communication and relationships with others.