沸かす

わかす

to boil

JLPT N4

Character Breakdown

Meaning and Usage

The verb 沸かす (わかす) means "to boil" or "to heat a liquid until it boils." It is commonly used when talking about boiling water, soup, or bathwater. This verb is transitive, so it requires a direct object, usually the liquid being boiled.

Common Collocations

  • お湯を沸かす: to boil water, often for tea or cooking.
  • お風呂のお湯を沸かす: to heat bathwater, a common household activity.
  • 鍋でスープを沸かす: to boil soup in a pot.

Usage Notes

When using 沸かす, the focus is on the action of causing the liquid to boil. It is different from 沸く (わく), which is intransitive and means "to boil" or "to be boiling." For example, お湯が沸く means "the water boils," while お湯を沸かす means "to boil the water."

This verb is polite enough for everyday conversation and is frequently used in cooking and daily life contexts.

Common Mistakes

Learners sometimes confuse 沸かす (transitive) with 沸く (intransitive). Remember that 沸かす always takes a direct object (the liquid), while 沸く does not.

Example Sentences

おゆをわかして、こうちゃをいれました。

I boiled water and made some tea.

かれはなべですーぷをわかしています。

He is boiling soup in the pot.

おふろのおゆをわかすのにじかんがかかります。

It takes time to heat the bathwater.