The latter is almost a spent force.

后者几乎是强弩之末。

youdao

Hagen was being written off as a spent force, after a string of sex scandals and internecine feuding.

ECONOMIST: Norway's politics

That is not to say the unions are a spent force: their strong public-sector membership makes strikes particularly disruptive.

ECONOMIST: Strikes: Life on Mars | The

Although the Tamil Tigers are unquestionably on the back foot, it would be dangerous to discount them as a spent force.

BBC: Is the end near for Sri Lanka's rebels?