denigrate

他不应该在没有根据的情况下贬低同事的工作。

He shouldn't ___denigrate his colleague's work without any basis.

竞争对手的广告似乎不是为了推广自己的产品，而是专门为了贬低这款新产品。

The competitor's ad campaign seemed designed to ___denigrate the new product rather than promote their own.

她觉得那篇文章贬低了整个行业，把多年的专业训练说成是纯粹的靠猜。

She felt the article ___denigrated the entire profession, reducing years of training to mere guesswork.