flimsily

adverb
1
in a way that is not strong enough for the purpose for which it is used
سست, بی‌بنیان, ضعیفانه
2
in a way that is difficult to believe
سست و شک‌برانگیز, به طور غیرقابل باور, به طور باورناپذیر
flimsily constructed excuses
synonym feebly