ineffectual
🇺🇸
/ˌɪnɪˈfektʃuəl/
🇬🇧
/ˌɪnɪˈfektʃuəl/
adjective
R
Lacking the power to produce a desired effect; weak and unable to achieve goals.
Despite his ineffectual attempts, the door remained locked.
尽管他尝试无效，门还是锁着的。
translation
无效的