What does "infirm" mean?

Infirm: Weak of mind or will; irresolute; vacillating. "An infirm judgment." Burke. Infirm of purpose! Shak.

Additional senses

  1. 2.Not solid or stable; insecure; precarious. He who fixes on false principles treads or infirm ground. South.
  2. 3.To weaken; to enfeeble. [Obs.] Sir W. Raleigh.

Sources