laborious

adj

1. Requiring much physical effort; toilsome.

   “Let us face it, our lives are miserable, laborious, and short.”

   “The coal is then transferred to broad-gauge wagons for transport to Dublin. The transhipment is a rather laborious business, the coal being shovelled by hand from one wagon to another.”

2. Mentally difficult; painstaking.
3. Industrious.

   “All, with united Force, combine to drive / The lazy Drones from the laborious Hive.”