化石

かせき

fossil, petrifaction, fossilization

JLPT N1

Character Breakdown

Meaning and Usage

"化石" primarily refers to fossils, the preserved remains or traces of ancient organisms. It is commonly used in scientific contexts when discussing paleontology or geology.

Figurative Use

Besides the literal meaning, "化石" is often used metaphorically to describe something or someone outdated or old-fashioned, especially ideas or habits that have not changed over a long time.

Common Collocations

  • 化石燃料 (かせきねんりょう): fossil fuels, referring to coal, oil, and natural gas derived from ancient organic matter.
  • 恐竜の化石 (きょうりゅうのかせき): dinosaur fossil, a frequent subject in paleontology.
  • 化石化する (かせきかする): to fossilize, used both literally and figuratively.

Register and Nuance

"化石" is a neutral noun used in both formal and informal contexts. When used figuratively, it often carries a slightly critical or humorous tone.

Learner Tip

Be careful not to confuse "化石" with similar-sounding words. Also, when used figuratively, it usually implies stubbornness or resistance to change, so context is important to understand the speaker's intent.

Example Sentences

このちいきではおおくのきょうりゅうのかせきがはっけんされた。

Many dinosaur fossils were discovered in this area.

かれのかんがえかたはまるでかせきのようにふるい。

His way of thinking is as old as a fossil.

かせきねんりょうはかんきょうもんだいのげんいんのひとつだ。

Fossil fuels are one of the causes of environmental problems.