ineffectiveness
🇺🇸
/ˌɪnɪˈfektɪvnəs/
🇬🇧
/ˌɪnɪˈfektɪvnəs/
When something doesn't work well or achieve the desired outcome.
The doctor was concerned about the ineffectiveness of the treatment.
의사는 치료의 무효성에 대해 우려했습니다.