Burned-out (adjective)

1. Exhausted or worn out by stress, work, or other demands.
2. No longer able to continue or function because of being overworked or stressed.
3. Having lost one's enthusiasm or passion for something due to prolonged stress or overwork.

Origin:

This phrase is made up of two words, "burned" and "out". "burned" is the past participle of the verb "burn" which means to destroy or damage by fire, and "out" means exhausted or used up, the phrase "burned-out" means to be exhausted or used up as a result of being too much exposed to something, like stress or work.

Examples:

1. The teacher was burned-out and needed a long break.
2. The athlete was burned-out and needed to take a few months off.
3. The employee was burned-out and needed to reduce their workload.
4. The writer was burned-out and needed to take a break from writing.
5. The entrepreneur was burned-out and needed to take a sabbatical.