風 化 作 用(ふうかさよう)

ふうかさよう

noun

weathering; weathering action

1. weathering; weathering action

The geological process by which rock is broken down in place by exposure to weather — temperature changes, water, and chemical reactions — without being carried away.

岩(いわ)が風化作用(ふうかさよう)で崩(くず)れる。

Rock crumbles through weathering.

風化作用(ふうかさよう)によって岩石(がんせき)が砂(すな)になる。

Weathering turns rock into sand.

温度(おんど)変化(へんか)による風化作用(ふうかさよう)が岩(いわ)に割(わ)れ目(め)を作(つく)る。

Weathering from temperature changes creates cracks in the rock.

Usage: 風化作用(ふうかさよう) is weathering — the in-place breakdown of rock — combining 風化(ふうか) (weathering) with 作用(さよう) (action). Note that 風化(ふうか) on its own also means figuratively "to fade from memory."

Common collocations

風化作用(ふうかさよう)を受(う)ける: to be subject to weathering
物理的(ぶつりてき)風化作用(ふうかさよう): physical weathering

Similar words

侵食作用(しんしょくさよう): erosion — wears rock away and transports it
風化(ふうか): weathering; fading — the base noun, also used figuratively

Related Words

Compare: 侵食作用(しんしょくさよう) (erosion)

general

Added 2026.7.2 3:18 · Revised 2026.9.2 13:02

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