flimsy

1. Likely to bend or break under pressure; easily damaged; frail, unsubstantial. · He expected the flimsy structure to collapse at any moment.
2. Of clothing: very light and thin.
3. Of an argument, explanation, etc.: ill-founded, unconvincing, weak; also, unimportant; paltry, trivial. (figuratively) · a flimsy excuse· the flimsiest of theories
4. Of a person: lacking depth of character or understanding; frivolous, superficial. (figuratively)

صيغة المقارنة flimsier · صيغة التفضيل العليا flimsiest