exacerbate

UG先生のinflameに続いて，exacerbateは「〈病気などを〉悪化させる」という意味の単語（『プログレッシブ英和中辞典』小学館）。同辞書には用例としてwords exacerbating a quarrel（けんかに油を注ぐ言葉）が挙げられていました。
記事はthe Straits Timesからの引用です。（Koyamamoto）

Japan PM Abe's Yasukuni visit to 'exacerbate tensions': US embassy

TOKYO (AFP) - The United States is "disappointed" by Prime Minister Shinzo Abe's visit to the Yasukuni war shrine, which will raise regional tensions, its embassy in Tokyo said on Thursday.
"Japan is a valued ally and friend. Nevertheless, the United States is disappointed that Japan's leadership has taken an action that will exacerbate tensions with Japan's neighbours," a written statement said.
http://www.straitstimes.com/breaking-news/asia/story/japan-pm-abes-yasukuni-visit-exacerbate-tensions-us-embassy-20131226