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M
merriam-webster.com
article
https://www.merriam-webster.com/dictionary/effective
efficacious suggests possession of a special quality or virtue that gives effective power.
a detergent that is efficacious in removing grease
effective, effectual, efficient, efficacious mean producing or capable of producing a result.
effective stresses the actual production of or the power to produce an effect.
effectual suggests the accomplishment of a desired result especially as viewed after the fact. [...] effective stresses the actual production of or the power to produce an effect.
an effective rebuttal
effectual suggests the accomplishment of a desired result especially as viewed after the fact.
the measures to stop the pilfering proved effectual
efficient suggests an acting or a potential for action or use in such a way as to avoid loss or waste of energy in effecting, producing, or functioning.
an efficient small car [...] Effective typically describes things—such as policies, treatments, arguments, and techniques—that do what they are intended to do. People can also be described as effective when they accomplish what they set out to accomplish, but the word is far more often applied to things.
D
dictionary.com
article
https://www.dictionary.com/browse/effective
If your email outlining a plan to reduce office paper waste resulted in a 20 percent reduction in paper use, that means your plan was effective: it did what you wanted it to do. The adjective effective has many shades of meaning, but you'll usually see it describing something that's able to produce a desired goal. Effective traces back to the Latin word effectivus, from efficere, meaning “work out, accomplish,” and that meaning still holds true. Something effective gets the job done. As [...] ## Usage
What are other ways to say effective? The adjective effective describes things that are adequate to accomplish a purpose, or that produce the intended or expected result. But effective isn’t quite the same as effectual, efficacious, or efficient! Find out why on Thesaurus.com.
## Synonym Usage
operative. telling.
## Other Word Forms
effectiveness
noun
effectivity
noun
preeffective
adjective
quasi-effective
adjective
subeffective
adjective
supereffective [...] Dictionary.com
Thesaurus.com
Synonyms
# effective
American
[ih-fek-tiv, ee-fek‐] / ɪˈfɛk tɪv, iˈfɛk‐ /
1. adequate to accomplish a purpose; producing the intended or expected result.
> effective teaching methods; effective steps toward peace.
Synonyms:
: competent, capable
Antonyms:
: useless, futile
2. actually in operation or in force; functioning.
> The law becomes effective at midnight.
3. producing a deep or vivid impression; striking.
T
thesaurus.com
article
https://www.thesaurus.com/browse/effective
From
The Wall Street Journal
●
Jul. 30, 2026
Logo link to The Wall Street Journal
Such long-lasting events worsen the stress heat puts on people’s bodies, and so does humidity, which can also render some solutions like taking cover in the shade less effective, Turner said.
From
Los Angeles Times
●
Jul. 30, 2026
Logo link to Los Angeles Times
Scientists hope this will lead to more effective fertility treatments.
From
"Boy 2.0" by Tracey Baptiste
### Related Words [...] Logo link to BBC
“I wish they were more popular. It’s really hard to get education out there on healthcare benefits. There’s no effective way that showcases how to make good use of those funds,” Walsh said.
From
MarketWatch
●
Jul. 31, 2026
Logo link to MarketWatch
According to Robert McClelland, senior fellow at the Tax Policy Center, a think tank, the highest effective rate—the amount of tariffs collected divided by the total value of imports—was 3% in Trump’s first term. [...] ### Related Words
Words related to effective are not direct synonyms, but are associated with the word
effective. Browse related words to learn more about word associations.
## Vocabulary lists containing effective
Vocabulary.com
### "Diary of a Wimpy Kid" by Jeff Kinney
Looking to grow your vocabulary? Check out this interactive, curated word list from our team of English language specialists at
Vocabulary.com – one of over 17,000 lists we've built to help learners worldwide!
C
collinsdictionary.com
article
https://www.collinsdictionary.com/us/dictionary/english/effective
SYNONYMS 1. capable, competent. effective, effectual, efficacious, efficient refer to that which is able to produce a (desired) effect. effective is applied to that which has the power to, or which actually does, produce an effect: an effective action, remedy, speech.effectual is used esp. of that which produces the effect desired or intended, or a decisive result: An effectual bombardment silenced the enemy.efficacious suggests the capability of achieving a certain end: an efficacious plan, [...] efficacious plan, medicine.efficient (applied also to persons) implies the skillful use of energy or industry to accomplish desired results with little waste of effort: efficient methods; an efficient manager.2. operative. 3. telling.ANTONYMS 1. futile, useless. [...] SYNONYMY NOTE: effective is applied to that which produces a definite effect or result [an effective speaker]; efficacious refers to that which is capable of producing the desired effect or result [an efficacious remedy]; effectual specifically implies the production of the desired effect or result in a decisive manner [an effectual reply to his charge]; efficient implies skill and economy of energy in producing the desired result and is often applied to persons [an efficient worker]
G
grammarly.com
article
https://www.grammarly.com/blog/commonly-confused-words/affective-vs-effective
When you want to say that something you’re doing is causing results, you can say that it’s effective. Specifically, something is effective when it produces the results you want. And that’s a very appropriate way to define effective, because we get the adjective from the noun effect—a result. It’s not too hard to remember the difference between affective and effective. You just have to use a small upside-down mnemonic device—when it comes to affective and effective, a is for emotion, and e is [...] Is affective just another word for effective? Are the two words similar and entangled in the way the verbs affect and effect are? No, affective is not just another word for effective. And affective and effective are not derived from the verbs affect and effect. They come from the nouns affect and effect.
Affective is usually used in the field of psychology and addresses emotions and feelings. Effective is common in everyday language to describe something that produces a desired result. [...] —Forbes
Twitter’s rights to the MLB and NHL games are effective immediately.
—Variety
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dictionary.cambridge.org
article
https://dictionary.cambridge.org/us/dictionary/english/effective
## effective | Business English
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## Examples of effective
## Translations of effective
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# Meaning of effective in English
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### effective adjective (SUCCESSFUL)
### effective adjective (IN FACT)
### effective adjective (IN USE)
### Related word
### Grammar
## effective | Intermediate English
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### effective adjective (PRODUCING RESULTS)
### effective adjective (IN USE)