Burdensome (adjective)

1. Being heavy or weighty; causing a heavy load.
2. Being difficult or hard to do or carry out.
3. Being oppressive or encumbering.

Origin:

From the middle english word "burdeous", which comes from the old english word "byrðensum", which means "having a heavy load" from the word "byrðen" which means "load" or "burden".

Examples:

1. The bags of groceries were burdensome to carry home.
2. The paperwork was burdensome to complete.
3. The regulations were burdensome for the small business.
4. The responsibility of caring for an elderly parent was burdensome.
5. The constant criticism was burdensome for her self-esteem.