All 5 Uses

acknowledge
in
A Child Called It
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At school we were the best of friends; however, at home, we both knew I was not to be acknowledged.
Chpt 3 *

acknowledged = recognized
Just as in the arm incident a few years ago, Mother was not going to acknowledge what had happened.†
Chpt 5

acknowledge = recognize
I think Father and I both knew the code of "the family"—if we don't acknowledge a problem, it simply does not exist.†
Chpt 5
Now, even the boys refused to acknowledge my presence in the house.†
Chpt 6
They look the other way, believing that by not acknowledging their past it will go away.†
Chpt P

acknowledging = recognizing

Definitions:

(1) (acknowledge as in: acknowledge her or the truth)
express recognition or appreciation of someone or something; or to admit or express something
(2) (meaning too rare to warrant focus)
Specialized senses include sending an "acknowledgement" (letter or other message) to indicate that something was received and the "acknowledgements" section at the beginning of a book where an author recognizes and thanks other people who helped in creating the book or ideas contained in it.