作用

さよう

operation, effect, function

JLPT N1

Character Breakdown

Understanding

The word primarily means 'effect,' 'function,' or 'operation.' It is commonly used to describe the impact or role something has in a particular context, such as medicine, machines, or social roles.

Common Uses

  1. Describing the effect of medicine or chemicals: often refers to the beneficial or harmful effects substances have.
  2. Explaining the function of objects or systems: It can describe what a machine or tool is designed to do.
  3. Indicating a person's role or influence in a group or situation.

Collocations and Patterns

  • (qǐ zuòyòng): to take effect, to play a role
  • (chǎnshēng zuòyòng): to produce an effect
  • (zuòyònglì): force of action

Usage Notes

When using to describe a person's role, it often implies a significant or functional contribution rather than just presence. Avoid confusing with , which is more about inherent functions rather than effects or roles. can be used in both formal and informal contexts, but it is more common in written or technical language.

Example Sentences

This medicine has a good effect on treating colds.

The function of the machine is to improve production efficiency.

He played an important role in the team.