费尽心机 (fèi jìn xīn jī) — to rack one's brains; to exhaust one's mental energy (often for scheming or achieving something difficult)

Definition

An idiom meaning someone has spent great mental effort, often with a hint of scheming or contriving rather than straightforward work. Stronger than just "thinking hard" — implies deliberate, calculated planning.

idiom
to rack one's brainsto exhaust one's mental energy (often for scheming or achieving something difficult)

Examples

  • ,费尽心机,。
    Wèi le zhè cì tán pàn, tā fèi jìn xīn jī, zhǔn bèi le hěn duō fāng àn.
    He racked his brains for this negotiation and prepared many plans.
  • 费尽心机,。
    Dí rén fèi jìn xīn jī xiǎng yào tū pò fáng xiàn, dàn zuì zhōng hái shì shī bài le.
    The enemy racked their brains trying to break through the defense line, but ultimately failed.
  • 费尽心机。
    Tā fèi jìn xīn jī cái xiǎng chū zhè ge wàn quán zhī cè.
    He racked his brains before coming up with this foolproof plan.

Origin

Compound word
构词法gòucífǎ
动宾dòngbīnVerb + object

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

费尽exhaust
费fèiexpend尽jìnexhaust
补充Verb + complement
心机mental schemes
心xīnmind机jīscheme
联合Coordinate

“费” means expend, “尽” means exhaust, “心” means mind, and “机” means scheme, so the sense is to exhaust one's schemes.

Characters in this word

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 費; 费 is its simplified writing.

Meaning part形符xíngfú
貝貝bèicowry
Sound part声符shēngfú
弗
弗fú費fèi
The sound has drifted apartThe sound part was a clue two thousand years ago — it often still helps, but not always.

The traditional form 費 has 貝, a cowry shell, and 弗, which gives a sound; the simplified 费 is a shorthand, and its parts are not the original pieces.

Open 费 →

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

This origin belongs to the traditional form 盡; 尽 is its simplified writing.

  • 聿聿yùhand holding a brush
  • 灬灬huǒbristles
  • 皿皿mǐndish

The traditional form 盡 shows 聿 (hand holding a brush) and 灬 (bristles) over 皿 (dish), cleaning a dish until it is empty. The simplified 尽 is a shorthand, not those historical parts.

Open 尽 →

A drawing of the thing itself, worn down over three thousand years into a few strokes.

The shape of 心 comes from a drawing of a heart, now highly stylized.

Open 心 →

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

Meaning part形符xíngfú
木木mùtree; wood
Sound part声符shēngfú
几
几jǐ机jī
Same sound today

The left part is 木 (tree; wood), and the right part 几 gives the sound.

Open 机 →

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