effective

eficaz, efectivo

Que funciona bien y consigue el resultado deseado.

En inglés sencillo: Something that works well and gives the result you want.

• This is an effective treatment for headaches.
• Their new strategy was surprisingly effective.
• Which method is most effective for teaching beginners?

Cómo se usa: effective against something (This spray is effective against mosquitoes.); effective in doing something (The lessons were effective in improving her reading.)

Sinónimos: successful, useful, efficient

Antónimos: ineffective

Expresiones frecuentes: effective treatment, effective method, effective against something, effective protection

vigente, en vigor

Que se aplica o funciona oficialmente desde un momento determinado.

En inglés sencillo: Officially applying or operating from a particular time.

• The new rules are effective immediately.
• The agreement became effective last month.
• What is the effective date of the change?

Cómo se usa: effective from a date (The contract is effective from the first of June.); effective on a date (The new policy becomes effective on Monday.)

Sinónimos: in force, valid

Expresiones frecuentes: effective date, become effective, effective from monday

impactante, eficaz

Que influye mucho en lo que las personas sienten, piensan o hacen.

En inglés sencillo: Having a strong effect on how people feel, think, or act.

• Her speech was brief but effective.
• The silence made the final scene especially effective.
• He delivered an effective argument that changed several minds.

Sinónimos: powerful, persuasive, forceful

Antónimos: ineffective

Expresiones frecuentes: effective speech, effective ending, effective argument

efectivo, de hecho

Que existe o se ejerce realmente, aunque no tenga reconocimiento oficial.

En inglés sencillo: Actually present or held in practice, even without official recognition.

• The rebels had effective control of the town.
• She held effective power despite having no official title.
• The agreement gave workers effective control over hiring.

Sinónimos: actual, de facto

Expresiones frecuentes: effective control, effective command, effective power

a partir de, desde

Indica el momento desde el que algo empieza a aplicarse oficialmente.

En inglés sencillo: Starting officially at the time mentioned.

• Effective Monday, parking will be free.
• The company raised its prices effective yesterday.
• Effective next year, all students will receive free lunches.

Cómo se usa: effective + time (Effective tomorrow, the office will open at eight.)

Sinónimos: as of, starting from

Expresiones frecuentes: effective immediately, effective tomorrow, effective next month