Deny, disavow, depending on whether you want to match the brevity or the surface morphology. I thought obver would be good, but it's not in the language -- objure is to take an oath, so it is different. The problem is that avoir, if it truly is the right root of aver, is "to have", and you cannot "un-have" or "dis-have". Thanks to Missi for the answer.
Quiet
Clearness.
rejected.
allows
forgettable or insignificant
Current or present is the closest antonym for the word former.
A close antonym would be shrinkage.
INSIGNIFICANT?
closed
Quiet
Clearness.
conceited
depressed
ineffective, ineffectual, unable, impuissant, Impotent
Non-communicative
unsurprised
allows