someone or something that is effective works well and produces the result that was intended
something that is efficient works well and produces good results by using the available time, money, supplies etc in the most effective way
The new machine is far more efficient than the old one.
efficient way/method: The most efficient way to plan is to put your tasks in order of priority.
make efficient use of something: This process makes efficient use of limited resources.
someone who is very interested in something or excited by it and spends time doing it or learning about it
The company was started ten years ago by two young computer enthusiasts.
very interested in something or excited by it
Business leaders gave an enthusiastic welcome to the proposal.
enthusiastic about: For a while, we were enthusiastic about the idea.
[UNCOUNTABLE] a feeling of enthusiasm or interest that makes you determined to do something
You can do anything if you've got the motivation.
improve/increase/strengthen someone's motivation: These methods can help to increase students' motivation and interest.
lack/lose motivation: She said she had lost her motivation.
motivation or enthusiasm
Motivation is a external impulse that inspires to create a willingness in any individual to accomplish an objective while enthusiasm is an internal impuIse within an individual that inspires to perform or accomplish an objective.
someone who takes part in something
It was argued that he was a willing participant in the crime.
participant in: the participants in a televised debate
to take part in something
Members are eligible for a 50% saving on room rates at all hotels that are participating in the scheme.
participate in: The rebels have agreed to participate in the peace talks.
to happen at the same time as something else
The arrivals of the boat and the train are supposed to coincide.
[COUNTABLE/UNCOUNTABLE] a situation in which separate things happen by chance at the same time or in the same way
coincidence that: It was rather a coincidence that she appeared at that exact moment.
by coincidence: By coincidence, his teaching contract finished at about the same time his first book was published.
no coincidence: It is no coincidence that coastal communities have often been deeply religious.
pure/sheer coincidence: It might have been planned or it might have been pure coincidence.
to succeed in dealing with or controlling a problem
Jimmy overcame his difficulties to graduate with a first-class degree.
What can I do to overcome my fear of rejection?
overcome▪ adversity, barrier, difficulty, disadvantage, fear, handicap, hurdle, limitations, obstacle, prejudice, problem, resistance, weakness
to officially stop something from being done, especially by making it illegal
Smoking is prohibited in all areas of the building.
The sale of alcohol to young people is prohibited by law.
prohibit someone from doing something: a rule prohibiting doctors from advertising their services
[COUNTABLE] a law or rule that stops people from doing something
prohibition on: Environmental groups want a total prohibition on the dumping of nuclear waste.
prohibition against: a prohibition against the disclosure of information
at one's disposal
the power or opportunity to make use of someone or something (esp in the phrase at one's disposal)