Dreye權威釋義 | ineffectual

a.

無效果的，徒勞無益的，不起作用的
ineffectual efforts
徒勞的努力
The searchlights were ineffectual in the fog.
探照燈在霧中不起作用。

ad.

ineffectually

n.

ineffectualness

同義:

a.無效的；白費的

同義參見:

反義參見:

以上來源於：《英漢大辭典》

adj.

not producing any or the desired effect.

▸lacking ability to cope with a role or situation:

she was ineffectual as a parent.

以上來源於：《簡明牛津英語詞典》