"Tired" is the most common word used in English to describe a feeling of fatigue or exhaustion. The word "tired" comes from the Old English word "tēred," which means "weary."

Examples:

"I'm feeling tired after working all day." (我工作了一整天感觉很累。)

"She was tired but decided to keep going." (她很累但决定继续走。)

"He was so tired that he fell asleep on the train." (他太累了，在火车上睡着了。)