When do I use 充足 vs 充沛?

Use 充足 for resources, conditions, or abstract justifications (time, money, food, evidence). Use 充沛 for natural forces, physical/mental energy, and strong emotions (rainfall, vitality, enthusiasm).

Can 充足 be used with 精力 (energy)?

It is possible but uncommon and sounds less natural. 充沛 is the standard collocation for 精力 and similar words like 体力 (physical strength).

Is there any overlap where both are acceptable?

Very rarely. In some metaphorical contexts, like '充足/充沛的阳光' (abundant sunlight), both might be used, but 充沛 emphasizes intensity (strong sun) while 充足 emphasizes sufficiency. For safety, stick to the collocations listed.

Why is 充沛 used for weather but not 充足?

Because 充沛 originates from the idea of 'full and vigorous' (充 'full' + 沛 'abundant water'), so it naturally pairs with rain, water, and by extension any abundant natural force. 充足 means 'enough' in a more neutral, quantitative sense.

Easily confusedHSK 5

充足 vs 充沛 (chōngzú vs chōngpèi): which 'abundant' to use

Both 充足 and 充沛 mean 'abundant' or 'sufficient' in English, but they collocate with different nouns. 充足 is used for tangible or abstract resources such as time, money, food, or reasons. 充沛 is used for natural phenomena or inner qualities like rainfall, energy, or vitality. Choosing the wrong one sounds unnatural.

充足 and 充沛 are both adjectives meaning 'abundant / sufficient', but they are not interchangeable. 充足 attaches to nouns that denote tangible or countable resources, conditions, or abstract justifications (e.g., supplies, time, evidence). 充沛 attaches to nouns that describe natural forces, bodily or mental vigor, or atmospheric conditions (e.g., rainfall, energy, enthusiasm). The key is to consider whether the noun is a 'resource' or 'vitality/force'.

Cuándo usar cada uno

充足chōng zú

sufficient / ample (resources, time, reasons)

Use 充足 for things that can be measured or counted as resources: time, money, food, supplies, evidence, reasons, light, etc. It emphasizes that the quantity or degree meets a need or standard.

充足 can also describe abstract conditions like '充足的信心' (sufficient confidence) but this is less common; 充沛 is preferred for mental states.

充沛chōng pèi

abundant / vigorous (energy, rainfall)

Use 充沛 for natural phenomena (rainfall, sunshine), physical vitality (energy, strength), or strong emotions/temperament (enthusiasm, passion). It conveys a sense of vigor or intensity, not just sufficiency.

充沛 is also used with '体力' (physical strength) and '精力' (energy); it does not collocate with time or money.

De un vistazo

	充足	充沛
Typical collocations	时间 (time), 金钱 (money), 食物 (food), 证据 (evidence), 理由 (reasons)	雨水 (rainfall), 精力 (energy), 体力 (strength), 热情 (enthusiasm), 阳光 (sunshine)
Core meaning	Sufficient in quantity or degree to meet a need	Abundant in intensity or vigor; full of energy
Use with abstract reasons/evidence	Yes (e.g., 充足的理由)	No
Use with natural forces (rain, sun)	No	Yes
Use with human vitality (energy, enthusiasm)	Rare, sounds off	Very common

Ejemplos

充足
我们有充足的时间准备考试。
Wǒ men yǒu chōng zú de shí jiān zhǔn bèi kǎo shì.
We have sufficient time to prepare for the exam.
Use 充足 because 'time' is a countable resource.
充沛
今年雨水非常充沛。
Jīn nián yǔ shuǐ fēi cháng chōng pèi.
This year's rainfall is very abundant.
Use 充沛 for natural phenomena like rain.
充沛
他精力充沛，工作到很晚。
Tā jīng lì chōng pèi, gōng zuò dào hěn wǎn.
He is full of energy and works until very late.
Use 充沛 for personal energy.
充足
警察找到了充足的证据。
Jǐng chá zhǎo dào le chōng zú de zhèng jù.
The police found sufficient evidence.
Use 充足 for evidence/reasons.
充沛
他对工作充满充沛的热情。
Tā duì gōng zuò chōng mǎn chōng pèi de rè qíng.
He is filled with abundant enthusiasm for work.
Use 充沛 for passion/enthusiasm.
充足
✗今天我有充沛的时间。（应为：充足的时间）
✗ Jīn tiān wǒ yǒu chōng pèi de shí jiān. (yīng wéi: chōng zú de shí jiān)
✗ I have abundant time today. (should be: 充足的时间)
✗ Using 充沛 for time is a common collocation error.

Errores comunes

Using 充沛 for time (e.g., 充沛的时间) — use 充足.
Using 充足 for rainfall (e.g., 充足的雨水) — use 充沛.
Using 充足 for personal energy (e.g., 充足的精力) — use 充沛.
Using 充沛 for evidence or reasons (e.g., 充沛的证据) — use 充足.

Preguntas frecuentes

When do I use 充足 vs 充沛?: Use 充足 for resources, conditions, or abstract justifications (time, money, food, evidence). Use 充沛 for natural forces, physical/mental energy, and strong emotions (rainfall, vitality, enthusiasm).
Can 充足 be used with 精力 (energy)?: It is possible but uncommon and sounds less natural. 充沛 is the standard collocation for 精力 and similar words like 体力 (physical strength).
Is there any overlap where both are acceptable?: Very rarely. In some metaphorical contexts, like '充足/充沛的阳光' (abundant sunlight), both might be used, but 充沛 emphasizes intensity (strong sun) while 充足 emphasizes sufficiency. For safety, stick to the collocations listed.
Why is 充沛 used for weather but not 充足?: Because 充沛 originates from the idea of 'full and vigorous' (充 'full' + 沛 'abundant water'), so it naturally pairs with rain, water, and by extension any abundant natural force. 充足 means 'enough' in a more neutral, quantitative sense.