The Vietnamese word "kiệt sức" is an adjective that means "worn out" or "exhausted." You can use this word to describe someone who is very tired, either physically or mentally, usually after a lot of hard work or effort.
Sau khi chạy marathon, tôi cảm thấy kiệt sức.
(After running the marathon, I feel exhausted.)
Công việc suốt tuần khiến tôi kiệt sức.
(Working all week has left me worn out.)
In more advanced contexts, "kiệt sức" can also refer to emotional or mental exhaustion. For example, you might say: - Sau khi giải quyết quá nhiều vấn đề, tôi cảm thấy kiệt sức về tinh thần.
(After dealing with so many issues, I feel mentally exhausted.)
While "kiệt sức" primarily means "exhausted," in some contexts, it can also imply being depleted or lacking resources, such as energy or motivation.