Roger Woodham replies:'efficient' or 'effective'?

affect or effect?

Affect and effect are often confused, Warda, even by native speakers of English. The most important thing to remember is that affect is used as a verb and effect is normally used as a noun. When they are used in this way, they are similar in meaning, signifying influence, impact or change. Compare the following:

Note: we talk about someone or something having an effect on something or someone. If we use effect as a verb, it means to carry out or to cause something to happen, but it is used only in very formal English. Consider the following:
  • 'Repairs could not be effected because the machines were very old.'

efficient effective

These two qualitative adjectives are often confused, Kisy. If somebody or something is efficient, then he, she or it works in a well-organised way, without wasting time or energy. Consider the following examples:

If something is effective, it works well and produces the results that were intended. Consider the following examples:
  • 'These tablets really are effective. My headache's much better now.'

  • 'The only effective way to avoid hay fever at this time of the year, if you are a sufferer, is to stay indoors.'