ineffectiveness
🇺🇸
/ˌɪnɪˈfektɪvnəs/
🇬🇧
/ˌɪnɪˈfektɪvnəs/
When something doesn't work well or achieve the desired outcome.
The doctor was concerned about the ineffectiveness of the treatment.
医生对这种治疗的无效性感到担忧。