TongTong
Sign in

散热 (sàn rè) — to dissipate heat; to radiate heat (technical)

Definition

A technical verb meaning 'to dissipate / radiate heat' — used for machines, electronics, and engines shedding heat during operation. Pairs with 系统, 器 (radiator), and similar technical terms.

verb
to dissipate heatto radiate heat (technical)

Examples

  • 散热。
    Diàn nǎo xū yào liáng hǎo de sàn rè xì tǒng.
    A computer needs a good heat dissipation system.
  • 。
    Zhè ge jī qì sàn le rè zhī hòu cái néng jì xù gōng zuò.
    After this machine has dissipated the heat, it can continue working.
  • 散热。
    Fā dòng jī tōng guò sàn rè qì sàn rè.
    The engine dissipates heat through a radiator.

Origin

Compound word
构词法gòucífǎ
动宾dòngbīnVerb + object

An action followed by what it acts on, fused into one word.

散sàndissipate
热rèheat

To 散 away is paired with 热, giving the action of letting heat leave.

Characters in this word

Two or more meaningful parts placed together so that their meanings combine into a new one.

  • 林林líntrees, forest
  • 攴攴pūto knock, to tap

散 combines 林 (trees or forest) and 攴 (to knock or tap), originally showing knocking to clear vegetation, later extended to breaking up or dispersing.

Open 散 →

Most characters — around four in five — are built this way: one part hints at the meaning, the other at the pronunciation.

This origin belongs to the traditional form 熱; 热 is its simplified writing.

Meaning part形符xíngfú
灬Written in full as火huǒfire
Sound part声符shēngfú
埶
埶yì熱rè
The sound has drifted apartThe sound part was a clue two thousand years ago — it often still helps, but not always.

The traditional form 熱 pairs 埶 with 火 (written as 灬) to show heat, while 埶 gives a sound.

Open 热 →
Appears in
Physics & Chemistry

Browse more HSK 7-9 words or search the full 43,000-word dictionary.