This word is acceptable for play in the UK dictionary that is being used in the following games:

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v. To refuse to acknowledge or recognize something; to disavow or deny.

v. To refuse to acknowledge; to deny; to disown.

To refuse to acknowledge; disown.

"Ultimately, to disacknowledge the use of wonder as a representation of what one sees as wonderful about the world is, I think, a disregard of its primary purpose, as basic a folly as if one considered all expressions of empathy a mask for cruelty."

disacknowledged    disacknowledging   

deny    disown