function

機能、役割

人や物が果たすべき仕事や役目。

やさしい英語で： The job that someone or something is meant to do.

• What is this button's function?
• The heart's main function is to pump blood.
• These tools have several different functions.

使い方： the function of something is to do something (The function of this button is to open the door.)

類義語： purpose, role, job

よく使う表現： main function, perform a function, function of something, serve a function

催し、行事

人々が集まるために計画された行事。大人数の場合が多い。

やさしい英語で： An arranged social event, often involving many people.

• The hall is available for functions.
• We met at a school function.
• She attends many official functions as mayor.

類義語： event, gathering

よく使う表現： social function, official function, attend a function, charity function

関数

入力する値のそれぞれに、出力する値を一つだけ対応させる規則。

やさしい英語で： A mathematical rule that gives exactly one output value for each input value.

• This function doubles every input.
• We plotted the function on a graph.
• Different functions can give the same output for one input.

類義語： map, mapping, operator, transformation

よく使う表現： linear function, function of x, plot a function, continuous function

関数、結果

量や性質が別のものによって決まるもの。

やさしい英語で： Something whose amount or nature depends on another thing.

• Price is a function of demand.
• Your pension is partly a function of your salary.
• Success is often a function of effort and opportunity.

使い方： be a function of something (The cost is a function of the distance travelled.)

類義語： result

よく使う表現： a function of, largely a function, partly a function

機能する、作動する

機械や体の一部、仕組みが本来の働きをする。

やさしい英語で： To work or operate, as a machine, body part, or system should.

• The machine still functions.
• Her kidneys are functioning normally.
• Can the system function without electricity?

類義語： work, operate

反対語： malfunction

よく使う表現： function properly, function normally, function well, continue to function

役割を果たす、として機能する

あるものの役割を果たしたり、その用途に使われたりする。

やさしい英語で： To do the job or serve the purpose of a particular thing.

• This box functions as a seat.
• The hall once functioned as a hospital.
• These words function as adjectives in this sentence.

使い方： function as something (The spare room functions as an office.)

類義語： serve as, act as

よく使う表現： function as something, function as a, function as an