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TOEFL IELTS BNC: 1007 COCA: 1133

effective

Word family 
Related topics: Law
ef·fec·tive /ɪˈfektɪv/ ●●● S2 W1 adjectiveadj  
1  EFFECTIVEsuccessful, and working in the way that was intended 有效的；产生预期效果的 OPP ineffective
 The cheaper drugs are just as effective in treating arthritis.
较便宜的药品对治疗关节炎同样有效。
 the painting’s highly effective use of colour
绘画中得心应手的色彩运用
 Training is often much less effective than expected.
训练的效果往往远低于预期。
 the most effective ways of reducing inner city congestion
减少旧城区交通拥挤最有效的办法
► see thesaurus at successful
 Register
In everyday English, people usually say that something works (well), rather than say that it is effective: 在日常英语中，人们表达某事物有效时，一般说work (well)，不说effective
The cheaper drugs work just as well.
较便宜的药物同样有效。
2  [no comparative, not before noun]SCLSTART TO HAPPEN, EXIST ETC if a law, agreement, or system becomes effective, it officially starts 〔法律、协议或制度〕生效的
effective from
 The cut in interest rates is effective from Monday.
利率下调从星期一起生效。
3  [no comparative, only before noun]IN FACT real rather than what is officially intended or generally believed 实际的，事实上的
 The rebels are in effective control of the city.
反叛者实际上已控制了该市。
—effectiveness noun [uncountableU]
n COLLOCATIONS
adverbs
extremely/highly effective
The company launched a highly effective advertising campaign.
nouns
an effective way
What’s the most effective way to control crime?
an effective method
Exams are not the most effective method of assessing students’ abilities.
an effective means
Is reducing the speed limit an effective means of reducing accidents?
effective action
The police must take effective action to protect the public.
an effective solution
The most effective solution to traffic congestion is to build more roads.
an effective treatment
Antibiotics are still the most effective treatment for this disease.
an effective system
The country has a simple but effective welfare system.
Examples from the Corpus
effective• The advertisement was simple but remarkably effective.• As existing dominant males age so doubtless can the collaborative attacks of younger animals prove increasingly effective.• Capital prosecutions are hideously expensive; life imprisonment is cheaper and just as effective.• Provided that post-storage image processing is not a major priority, analogue technology is effective.• Malarone is a new drug that has already proved highly effective.• Penicillin can be taken in various forms and is effective against a wide range of infections.• His resignation is effective April 8.• How effective are lawyers in solving legal problems?• Pimozide is now also being used; it appears to be approximately as effective as haloperidol and may have fewer side effects.• Antibiotics are only effective if you finish the whole course of treatment.• In my opinion neither of these arguments is effective in destroying its opponent.• Doctors soon realized that this drug was also effective in relieving the symptoms of arthritis.• The less expensive drugs were just as effective in treating arthritis.• What we need is a tough and effective leader with a sense of direction.• Rapid advancements in technology have reduced the effective lifespans of computers.• Our training programme covers a range of effective management techniques.• The idea that there could be such authority without effective power hardly occurred to anyone.• An effective teacher will always produce better exam results.• High-performance work design enabled them to achieve those objectives by increasing flexibility, output quality and effective use of assets.• The effective use of color can make a small room look much bigger.• The new system has proved to be a highly effective way of extending trading hours.• There are many effective ways of using videos in language teaching.
highly effective• Despite this opposition the attack was highly effective.• It is well targeted and highly effective.• We need spies because Soviet security is highly effective.• Malarone has already proved highly effective in other trials.• Gold salts are highly effective in the management of patients with rheumatoid arthritis, most adverse reactions being mild and reversible.• As a political strategy it was highly effective, successfully confronting the medical discourse which lay behind regulation.• Hepatitis remains a killer, and although a highly effective vaccine is now available, very few gay men have taken it.• This drug is highly effective when used within the first several hours after the onset of acute arthritis.
From Longman Business Dictionary
effectiveef·fec·tive /ɪˈfektɪv/ adjectiveadj
1working well and producing the result or effect that was wanted or intended
The company mounted a very effective publicity campaign.
The 7% increase in sales shows that the company has become more effective in marketing its services.
→ see also cost-effective
2[not before a noun] if a law, agreement, or system becomes effective, it officially starts
effective from
The new rates are effective from 22 February.
3[only before a noun] real, although not obvious or officially recognized
Following the takeover, they now have effective control of the German computer market.
ef·fec·tive adjectiveadj →REGISTER1 →n COLLOCATIONS1
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