Effective. Efficient. Effectual. Efficacious

1.

Effective – producing a desired result
Efficient – producing an intended result
Effectual – producing the result that is wanted and
intended
Effectual – effective and successful (formal)
Efficacious – able to produce an intended result (formal) /
working in the way you intended
the most effectual means of preserving peace
They wish to promote a real and effectual understanding
between the two countries
He sees the present as the open door to
an efficacious future.

2.

We use effective to describe something that gives you
the results you want:
Taking this tablet is a very effective cure for travel
sickness.
In this light, the camera is more effective if you use the
flash.
Services need to be more effectively organised than they
are at present

3.

An effective public transport system
To function effectively
The effectiveness of computers as an educational tool

4.

Effective means having a particular role or result in
practice, though not officially or in theory.
Virtual
Essential
Practical
They have had effective control of the area since the
security forces left.
The restructuring resulted in an effective increase on
fares.

5.

producing a striking impression;
An effective entrance

6.

The company launched a highly effective advertising
campaign.

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12.

Welfare is a type of government support intended to
ensure that members of a society can meet basic
human needs such as food and shelter. Social
security may either be synonymous with welfare, or
refer specifically to social insurance programs, which
provide support only to those who have previously
contributed (e.g. most pension systems), as opposed
to social assistance programs, which provide support
on the basis of need alone (e.g. most disability
benefits).

13.

We use efficient to describe something or someone that
works in a quick and organised way
If something or someone is efficient, they are able to
do tasks successfully, without wasting time or energy
The new online banking system offers a convenient
and efficient way to check your account.
It could be an exceptionally efficient and economical way to
make buildings more comfortable and energy efficient.
I have always known James to be highly competent
and efficient in all aspects of his job.

14.

performing or functioning in the best possible manner with the least
waste of time and effort; having and using requisite knowledge, skill,
and industry; competent; capable
a reliable, efficient secretary
I have always known James to be highly competent
and efficient in all aspects of his job.

15.

The factory is modern and highly efficient.