Underemployed (adjective)

1. Working in a job that is below one's qualifications, abilities, or aspirations.
2. Not working as much as one would like or needs to, especially in terms of hours or pay.

Origin:

From under- + employed, ultimately from latin implicare, "to entwine".

Examples:

1. The graduate was underemployed, working as a barista despite having a degree.
2. The worker was underemployed, only able to find part-time work.
3. The skilled laborer was underemployed, not using their full abilities in their job.
4. The veteran was underemployed, not able to find work related to their military experience.
5. The immigrant was underemployed, not able to find work in their field due to language barriers.