Counter-vails is a relatively uncommon word that means to offset or balance out something. It is often used in legal contexts to refer to compensation for damages or losses suffered. Antonyms for counter-vails include words that either signify an absence of compensation or a reversal of the effects of the original action. Some possible antonyms for counter-vails include words such as harm, injury, loss, penalty, punishment, retribution, reparation, and reversal. These words suggest a lack of balance or compensation and reflect a negative outcome or consequence of an action. Understanding antonyms like these can help to clarify the meanings of less common words like counter-vails.