function

duty, obligation, responsibility, function

这些名词都有“义务”或“职责”之意。
duty: 指按道德和法律的标准，一个人永远要尽的义务，强调自觉性。
obligation: 指道义上或法律上对他人的义务，强调强制性。也指因作出承诺而被迫履行的某种义务。
responsibility: 指任何义务、职责、责任或职务上所应尽的本分，强调对他人的责任。
function: 指因职务或职业关系去履行某种职责。

名词 function:

1. a mathematical relation such that each element of one set is associated with at least one element of another set
   同义词：mathematical function
2. what something is used for
   同义词：purpose, role, use
3. the actions and activities assigned to or required or expected of a person or group
   同义词：office, part, role
4. a relation such that one thing is dependent on another
5. a formal or official social gathering or ceremony
6. a vaguely specified social event
   同义词：affair, occasion, social occasion, social function
7. a set sequence of steps, part of larger computer program
   同义词：routine, subroutine, subprogram, procedure

动词 function:

1. perform as expected when applied
   同义词：work, operate, go, run
2. serve a purpose, role, or function
   同义词：serve
3. perform duties attached to a particular office or place or function
   同义词：officiate

1. Some English adverbs function as adjectives.
   英语中有些副词可作形容词用。
2. His brain seems to be functioning normally.
   他的大脑看来功能正常。
3. The machine won't function properly if you don't oil it well.
   如果你不给机器好好加油的话，它就不会正常运转。
4. The function of an adjective is to describe or add to the meaning of a noun.
   形容词的作用是描述或增加名词的意思。
5. The minister has to attend all kinds of functions.
   部长必须参加各种集会。

func.tion

n.（名词）
The action for which one is particularly fitted or employed.
作用，功能：特别适合某人或某人所从事的行为

Assigned duty or activity.
职务，职责：分派的职责或指定的活动
A specific occupation or role:
角色，职业：特定的工作或角色：
例句：
in my function as chief editor.
在我担任总编辑的职位

An official ceremony or a formal social occasion.
重大聚会，庆典：官方典礼或正式社交场合
Something closely related to another thing and dependent on it for its existence, value, or significance:
应变物：与另一决定它的存在、价值或重要性的事物密切相关的事物：
例句：
Growth is a function of nutrition.
长身体是由营养决定的

Abbr. fMathematics
缩写 f【数学】
A variable so related to another that for each value assumed by one there is a value determined for the other.
应变量，函数：一个与他量有关联的变量，这一量中的任何一值都能在他量中找到对应的固定值
A rule of correspondence between two sets such that there is a unique element in the second set assigned to each element in the first set.
函数：两组元素一一对应的规则，第一组中的每个元素在第二组中只有唯一的对应量
v.intr.（不及物动词）
func.tioned,func.tion.ing,func.tions
To have or perform a function; serve:
有或起作用；行使职责：
例句：
functioned as ambassador.
行使大使的职责

来源：
Latin fônctiô fônctiôn- [performance, execution]
拉丁语 fônctiô fônctiôn- [履行，实施]
from fônctus [past participle of] fungo [to perform, execute]
源自 fônctus [] fungo的过去分词 [去履行，去实施]

【引伸】
func.tionless
adj.（形容词）
<参考词汇><同义词>function,duty,office,roleThe central meaning shared by these nouns is .the actions and activities assigned to, required of, or expected of a person.:
这些名词所共有的中心意思是.指派给、需要或期望某人完成的行动或活动.
例句：
the function of a teacher;
老师的作用；

例句：
a bank clerk`s duty;
银行职员的职责；

例句：
assumed the office of financial adviser;
担任财政顾问这个职务；

例句：
the role of a parent.
父母的职责