ineffective

UK/ɪnɪ'fektɪv/US/.ini'fektiv/

Definitions

adj.

Not producing the intended result; not working.

无效的；不起作用的。

Root Breakdown

Root-derived

in-not, opposite of

ef-out of, from

fectmake, do

-ivetending to, having the nature of

=ineffective

in- (not) + effective. effective = ef- ('out') + fect (fac, 'make') + -ive = 'able to bring an effect out.' Ineffective = failing to produce that effect. See effective.

Root fac still carries 273 more words

Common Collocations

1.completely ineffective完全无效
2.largely ineffective基本无效
3.prove ineffective被证明无效

Example Sentences

1.
The medication proved ineffective against the new strain.
2.
Their marketing campaign was largely ineffective.

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