in·ef·fec·tu·al /ˌɪnəˈfɛkʧə(wə)l, ˈfɛkʃwəl/
(a.)無效的,無益的,白費的
In·ef·fec·tu·al a. Not producing the proper effect; without effect; inefficient; weak; useless; futile; unavailing; as, an ineffectual attempt; an ineffectual expedient.
The peony root has been much commended, . . . and yet has been by many found ineffectual. --Boyle.
Syn: -- Inefficient; useless; inefficacious; vain; fruitless; unavailing; futile. See Useless, Inefficacious.
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ineffectual
adj 1: not sufficient to produce a desired result; "an ineffectual
effort to block the legislation" [ant: effectual]
2: not producing an intended effect; "an ineffective teacher";
"ineffective legislation" [syn: ineffective, uneffective]
[ant: effective]
3: producing no result or effect; "a futile effort"; "the
therapy was ineffectual"; "an otiose undertaking"; "an
unavailing attempt" [syn: futile, otiose, unavailing]
4: lacking in power or forcefulness; "an ineffectual ruler";
"like an unable phoenix in hot ashes" [syn: ineffective,
unable]