effective

• 形容事物能够成功地产生所期望的结果，或在实际中真正起作用。

Describes something that successfully produces the intended result.

1. Successful in producing a resultB1formal

   Able to achieve a desired outcome or effect.

   有效的

   • This medicine is very effective against headaches.
   • The new marketing strategy proved to be highly effective.
   • Effective communication is key to a successful team.

   同义词capableeffectualefficaciousfruitfulpotentproductivesuccessful

   反义词futileineffectiveinefficaciousunproductiveunsuccessfuluseless

2. In operation or activeB1formal

   Starting to be used or having legal force.

   生效的

   • The new law becomes effective on January 1st.
   • The contract is effective from the date of signing.
   • The policy is effective immediately.

   同义词activebindingcurrentin effectin forceoperativevalid

3. Impressive or strikingB2informal

   Having a strong or noticeable effect.

   引人注目的

   • The lighting in the theater was very effective.
   • She made an effective argument during the debate.
   • The use of color in the painting is highly effective.

   同义词compellingconvincingdramaticforcefulimpressivepotentpowerfulstrikingtellingvivid

   反义词ineffectiveunimpressiveweak