Similar words
efectivo
efectivo and eficaz are close synonyms for "effective," largely interchangeable.
Similar in other languages
German
effektiv
effektiv is the German word for the same thing — both mean "effective."
German
wirksam
wirksam is the German word for the same thing — both mean "effective."
Portuguese
eficaz
eficaz is the Portuguese word for the same thing — both mean "effective."
Practice
1 What does eficaz mean?
effective
2 Fill the gap: Es un método ___.
Full sentence: Es un método eficaz. (It's an effective method.)
3 Which fingerprint chart matches eficaz?
eficaz: neutral register, common frequency, general domain, neutral connotation.