Despite this, bonus quest enemies that have been added to the game are described as posing a "more vigorous challenge".

Civil libertarians agree, and are raising vigorous challenges in higher courts.

Considered a moderate, she was disliked by conservatives and faced vigorous primary challenges.

The state Republican Party has made clear that it will mount a vigorous challenge in the 1990 gubernatorial race.

The tour mounted a vigorous challenge primarily on the grounds that walking is an essential part of high-level golf competition.

The industry is expected to mount a vigorous legal challenge before the law is to take effect late in the decade.

Incumbents in several Assembly races also fared well after facing vigorous challenges.

The President's lawyers are expected to mount a vigorous challenge to the House case on factual, legal and constitutional grounds.

But at least a half-dozen incumbents are trying to fend off vigorous challenges by insurgents.

The statements are among the most vigorous and open challenges to the Communist Party's suppression of free speech in recent years.