If you say that someone or something is unfit for a particular purpose or job, you are criticizing them because they are not good enough for that purpose or job.
双语例句
例: Existing houses are becoming totally unfit for human habitation.
现存的房子正变得完全不适合人居住。
例: They were utterly unfit to govern.
他们完全不胜任管理工作。