DictionaryRoot: ex-
Latin

ex-

out, away; also thoroughly

Forms

  • ex-
  • e- — Shortened in Latin before certain consonants.
  • ef- — Used before f in Latin.
  • es- — Developed from ex- in French.
  • s- — In some French borrowings, es- lost its initial e.

Origin

Reconstructed Proto-Indo-European *eghs, ‘out.’

Note

The outward sense could extend to carrying an action through completely.

11 / 239
adjective

effective

ih-FEK-tiv/ɪˈfektɪv/

Successful in producing the intended result.

The umbrella is effective at keeping the person dry in the rain.

A well-fitted umbrella keeps a person dry in rain.
Etymology

“Out” and “make” combine in a Latin verb meaning “work out, accomplish.” Effective describes something that carries an intention through to accomplishment: it produces the result aimed at.

In context

365 Financial Analyst0:20
Reciprocation is an extremely effective technique to stimulate a relationship of favor-giving and compliance. It works in a very straight-forward way: you should try to repay, in kind, what another person has provided to you.
The Reciprocation Principle - The Six Principles of Influence

More examples

  • This cleaner is effective at removing grease.
  • The treatment is more effective when started early.
  • An effective teacher makes difficult ideas easy to understand.

Forms

effective · more effective · most effective

effectively adverb — In a way that achieves intended results.

effectiveness noun — The degree to which something achieves intended results.

Similar words

successful
Emphasizes achieving a goal rather than producing an intended effect.
efficient
Adds the idea of minimizing wasted time, effort, or resources.