累

You use 累 to describe yourself or others when they are tired. It's super flexible! You can say "I am tired" as "我 累" (wǒ lèi). Or you can add context, like "I'm tired from work" – "我上班 累" (wǒ shàngbān lèi). It can also be used as an adjective describing something that causes tiredness, like "a tiring job" – "一份 累 的工作" (yī fèn lèi de gōngzuò). It’s pretty straightforward once you get the hang of it. Just remember, it’s about feeling drained.

Imagine you just finished a huge project. You'd tell your friend, "我太 累 了" (wǒ tài lèi le) – "I'm so tired." Or maybe you stayed up all night watching a K-drama. You’d text your buddy, "昨晚没睡好，现在好 累" (zuó wǎn méi shuì hǎo, xiànzài hǎo lèi) – "Didn't sleep well last night, I'm so tired now." If your feet are aching after a day of sightseeing, you might groan, "我的脚好 累" (wǒ de jiǎo hǎo lèi) – "My feet are so tired." It’s all about that feeling of needing a break.

Use 累 anytime you feel physically or mentally exhausted. After a long day of studying for exams? 累. After a strenuous workout at the gym? 累. After a stressful week at work? Definitely 累. It’s your go-to for any situation where you're running on empty. It’s perfect for casual chats with friends, texting your family, or even just muttering to yourself when you’re feeling the slump. Think of it as the universal sign for "nap time, please!"

Don't use 累 to describe something that is *physically heavy* but not tiring to lift, like a "heavy book" (沉重 - chénzhòng). Also, avoid using it for things that are *difficult* in a challenging sense, like a "difficult problem" (难 - nán). 累 specifically means *tiredness* or *exhaustion*. Using it for a difficult math problem might confuse people; they might think you're tired *from* the problem, not that the problem itself is inherently tiring to solve. It’s all about the *feeling* of fatigue.

A common slip-up is confusing 累 (lèi - tired) with 累 (lěi - to accumulate/gather). They look the same but have different pronunciations and meanings! Another mistake is using 累 when you mean something is just "difficult" (难 - nán). For example, saying "这个工作很 累" (zhège gōngzuò hěn lèi) when you mean the job is *challenging* rather than *tiring*. The correct way to say a job is challenging is "这个工作很难" (zhège gōngzuò hěn nán).

There are other words for feeling tired, but 累 is the most general. You might hear 疲劳 (píláo), which sounds a bit more formal and often refers to physical fatigue or exhaustion, like "jet lag" or "work fatigue." For a more intense, bone-deep weariness, you could use 精疲力尽 (jīng pí lì jìn), meaning "exhausted to the limit." But for everyday "I'm tired," 累 is your best friend. Think of 累 as the casual T-shirt, 疲劳 as a slightly nicer polo, and 精疲力尽 as a full-on suit for extreme exhaustion.

You'll often hear 累了 (lèi le), which means "got tired" or "am tired." The 了 (le) particle indicates a change of state or completion. So, "我 累了" (wǒ lèi le) is super common. You might also hear 好累 (hǎo lèi), meaning "so tired," or 太累 (tài lèi), meaning "too tired." Sometimes people add 死 (sǐ - to die) for emphasis: 累死了 (lèi sǐ le), literally "tired to death," but it just means *extremely* tired. It’s like saying "I'm dying of exhaustion!" but in a fun, exaggerated way.

Is 累 formal or informal? It's mostly neutral to informal. Can I use it for mental tiredness? Yes, absolutely! Is there a word for "energized"? Yes, 有精神 (yǒu jīngshén) or 精力充沛 (jīnglì chōngpèi).