lacking firmness or vigour
flaccid - limp
The word ‘flaccid’ is commonly used to describe something which is limp, soft, or weak in composition or texture. However, it also frequently appears in relation to something which is lackluster and listless, such as poor leadership, a feeble performance or argument, etc.
The doctor said that flaccid skin, hair, and muscles are just some of the characteristics of old age.
Liam’s flaccid leadership is what scuppered the project. We needed somebody more authoritative.
Sarah tried to get her point across in the meeting, but she presented a flaccid and misguided argument that swayed nobody.