Not physically strong
So lacking in strength as to be barely audible
Having little substance or significance; not solidly based
Their government was feeble and corrupt.
While the fools looked for my car nearby, I, in spite of excruciating pain, managed to escape their feeble efforts to find me.
Daylight was making a feeble attempt to break through the heavy cloud cover.
All who reach old age must lose their strength and become like him, feeble and gray.