ADV

fully
freely, readily
clearly, explicitly
effectively, implicitly, tacitly
The peace settlement effectively acknowledged the country's independence
formally, officially
openly, publicly
He acknowledged publicly that he might have made a mistake
privately
reluctantly, ruefully

VERB + ACKNOWLEDGE

fail to, refuse to
be forced to
Mental illness can exist for years before families are forced to acknowledge the truth

PHRASES

be generally/universally/widely acknowledged
a truth that is universally acknowledged

ADV

duly
The company duly acknowledged receipt of the letter
hereby
I hereby acknowledge receipt of your letter of 25 July