What does "ineffective" mean?

1. (not producing results) not producing the result you want or not working correctly. 2. (lacking ability) not having the skills or power to do a job well.

How do you use "ineffective"?

Often used to describe laws, policies, medicines, or mechanical systems.

ineffective

adj.

US //ˌɪnɪˈfɛktɪv// UK //ɪnɪfˈɛktɪv// in·ef·fec·tive

1 not producing results (adj.)
B2 Upper Intermediate

not producing the result you want or not working correctly.

failing to produce the intended or desired effect; lacking efficacy.

Example

The old heating system was ineffective and the house stayed cold all winter.

Example

The government's latest economic policy proved ineffective at curbing inflation, leading to widespread public dissatisfaction and calls for reform.

Usage

Often used to describe laws, policies, medicines, or mechanical systems.
2 lacking ability (adj.)
C1 Advanced Formal

not having the skills or power to do a job well.

lacking in ability, competence, or the necessary qualities to perform a role successfully.

Example

The manager was ineffective because he could never make a firm decision.

Example

The board eventually removed the CEO, citing her ineffective leadership during the merger as the primary reason for the company's declining stock value.

Teacher's tip

When describing people, this word is more formal and slightly more polite than calling someone 'bad' or 'useless', though it remains a serious criticism.

Origin

From in- + effective.