1) Badly 2) Incompetently 3) Powerlessly 4) Reluctantly 5) Unsuccessfully 6) Wanly 1) Dimly 2) Faintly 3) Imperceptibly 4) In a faint and feeble manner 5) In a weak manner 6) Softly 7) Weakly 8) Without much gusto 9) Without much power 10) Without vigor 
• (adv.) In a feeble manner.
Fee'bly adverb In a feeble manner. « The restored church . . . contended feebly , and with half a heart.» Macaulay. 
[adv] - in a faint and feeble manner 2. [adv] - in a halting and feeble manner
adverb in a halting and feeble manner; `reform, in fact, is, rather feebly, on the win`