protest
/ˈprō-ˌtest/
noun
a solemn declaration of opinion and usually of dissent: such as
a sworn declaration that payment of a note or bill has been refused and that all responsible signers or debtors are liable for resulting loss or damage
a declaration made especially before or while paying that a tax is illegal and that payment is not voluntary
verb
to make solemn declaration or affirmation of
to execute or have executed a formal protest against (something, such as a bill or note)
to make a statement or gesture in objection to
protest my innocence
idiom
while expressing objection, disagreement, or disapproval of the need to perform an act
He paid the fine under protest.