The term 'in a weak manner' can be described using the crossword solutions wanly (5 letters), feebly (6 letters), and tenuously (9 letters). Wanly is an adverb meaning in a weak, feeble, or delicate manner. Feebly is an adverb meaning in a weak or feeble manner. Tenuously is an adverb meaning in a weak, fragile, or insubstantial manner. All three words describe something that is done in a weak or feeble way.