When combined, the characters literally translate to “Spirit (is) fatigued, strength (is) exhausted.” This structure beautifully conveys a state of profound exhaustion that is simultaneously mental and physical.
精疲力尽 (jīng pí lì jìn) is more than just a phrase; it's deeply connected to the Chinese cultural value of diligence and perseverance, often summarized by the idiom 吃苦耐劳 (chī kǔ nài láo) - “to eat bitterness and endure hardship.” In many contexts, reaching a state of being `精疲力尽` is seen as a sign of dedication and commitment. A student who is `精疲力尽` from studying for the grueling `gaokao` (college entrance exam) or an employee exhausted from working overtime to complete a project is often viewed with respect. Their exhaustion is proof of their hard work and sacrifice for a greater goal, whether it be personal success or the collective good of the company or family. This contrasts with the Western concept of “burnout.” While both describe exhaustion, “burnout” typically carries a strong negative connotation of chronic, unhealthy stress leading to cynicism and emotional detachment. 精疲力尽, on the other hand, is often used to describe an acute, temporary state of exhaustion following a specific, intense effort. While it's an unpleasant feeling, the reason for it can be a source of pride.
While it is a formal idiom, 精疲力尽 (jīng pí lì jìn) is widely understood and frequently used in both formal and informal situations to add emphasis and color.