This is the 8308th most frequent Japanese word.
強要
Coercion; forceful demand.
強要 is used here to denote imposing demands forcefully and against someone's will.
彼は無理な要求を強要してきた。
He forcefully demanded unreasonable requests.
強要 is used here to describe being coerced into taking an action, specifically resigning.
仕事を辞めるよう強要されるのは不当だ。
Being forced to resign from a job is unreasonable.
強要 indicates coercing someone to perform an action, in this case, testifying.