Weary (adjective)

1. Feeling tired and lacking energy.
2. Feeling that one can no longer deal with a situation or continue to do something.

Origin:

Old english wærig, of germanic origin; related to dutch waar and german wahr "true".

Examples:

1. He was feeling very weary after a long day of work.
2. She was weary of all the traveling she had to do for her job.
3. The soldiers were weary after a long march.
4. The audience was weary of the monotonous speech.
5. The teacher was weary of dealing with the unruly students.