Countervail (verb)

1. Counterbalance or offset the effects or consequences of (something).
2. Counterbalance or counteract (something) by exerting equal or opposite force or influence.

Origin:

Middle english: from old french contrevaillier "counterbalance", from contre- "against" + vaillier "to balance".

Examples:

1. Her charitable work countervailed the negative publicity from her scandals.
2. His vast wealth countervailed the effects of the economic downturn.
3. The government tried to countervail the rising prices with subsidies.
4. Her charm countervailed her lack of education.
5. The company tried to countervail the competition by improving their product quality.