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:
- 'She was efficient in everything she did and was frequently
commended for exemplary service to the organisation.'
- 'He hasn’t made very efficient use of his time in
revising for these exams: he has made no notes and his concentration spans
appear to last for no longer than ten minutes.'
- 'This engine is really efficient, it can run for 30 km
on only 1 litre of fuel.'
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.'
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