形成

けいせい

formation

JLPT N1

Character Breakdown

Meaning and Usage

The noun 形成 (けいせい) refers to the process or result of forming or shaping something. It is often used in formal or academic contexts to describe natural, social, or abstract formations, such as mountains, opinions, or societies.

Common Contexts

  • Natural formations: geological features like mountains or landforms.
  • Abstract or conceptual formations: opinions, social structures, or organizations.

Collocations and Patterns

  • 形成される (to be formed): passive form commonly used to describe natural or gradual formation.
  • 形成過程 (けいせいかてい): formation process, often used in scientific or sociological discussions.
  • 意見の形成 (いけんのけいせい): formation of opinions.

Register and Nuance

This word is formal and typically appears in written language, academic texts, or formal speech. It is not commonly used in casual conversation.

Common Learner Mistake

Learners sometimes confuse 形成 with 作る or 作成, which mean "to make" or "to create" but imply more active or deliberate creation. 形成 emphasizes a process or natural development rather than intentional making.

Example Sentences

このやまはながいねんげつをかけてけいせいされた。

This mountain was formed over a long period of time.

いけんのけいせいにはおおくのじょうほうがひつようだ。

The formation of opinions requires a lot of information.

しゃかいのけいせいかていをまなぶことはじゅうようだ。

It is important to study the process of social formation.