汚す

よごす

to pollute, to make dirty

JLPT N3

Character Breakdown

Meaning and Usage

The verb 汚す (よごす) means "to make dirty" or "to pollute." It is a transitive verb, so it always takes a direct object that is being dirtied or polluted. This word is commonly used in everyday situations, such as dirtying clothes or hands, as well as in environmental contexts like polluting rivers or air.

Common Collocations

  • 服を汚す (ふくをよごす): to dirty clothes
  • 川を汚す (かわをよごす): to pollute a river
  • 手を汚す (てをよごす): literally "to dirty hands," often used figuratively to mean getting involved in unpleasant or morally questionable work

Register and Nuance

汚す is neutral in formality and can be used in casual and polite contexts. It often implies a negative effect on cleanliness or purity. When used figuratively, such as 手を汚す, it can imply moral or ethical contamination.

Common Mistakes

Learners sometimes confuse 汚す with 汚れる (よごれる), which is the intransitive form meaning "to become dirty." Remember, 汚す requires a direct object (something being dirtied), while 汚れる describes the state of becoming dirty by itself.

Example Sentences

こどもがふくをよごしてしまった。

The child ended up dirtying the clothes.

かわをよごすのはかんきょうによくない。

Polluting the river is bad for the environment.

てをよごさずにしごとをするのはむずかしい。

It's difficult to do work without getting your hands dirty.