Troublesome (adjective)

Causing difficulties, problems, or discomfort; annoying or vexing.

Origin:

The word 'troublesome' is derived from the old french word 'troubleus' meaning 'troubled' or 'distressed'.

Examples:

1. The troublesome issue had been bothering the company for a long time and they couldn't find a solution.
2. The troublesome behavior of the student was a source of concern for the teacher and the school administration.
3. The troublesome noise from the construction site was disturbing the peace and quiet of the neighborhood.
4. The troublesome guest at the hotel was causing trouble with the staff and other guests.
5. The troublesome malfunction of the equipment caused delays and disruptions in the production process.