Cumbersome

Adjective

1. Burdensome or hindering, as if a weight or drag; vexatious.
2. Not easily managed or handled; awkward; clumsy.

   "Cumbersome machines can endanger operators and slow down production."

3. Hard, difficult, demanding to handle or get around with.

   "A slave’s work was as cumbersome as toiling on the fields, or in the mines."

4. Inert, lumbering, slow in movement.