cumbrous

adjective3

1. •
   (literary) Unwieldy because of size or weight; cumbersome.

   • Possession's load was grown so great, / He sunk beneath the cumbrous weight: […] — 1727
2. •
   (literary, no longer used) Giving annoyance or trouble; troublesome, vexatious.

   • Henceforth I flie not Death, nor would prolong / Life much, bent rather now I may be quit / Fairest and easiest of this combrous charge, / Which I must keep till my appointed day / Of rendring up. — 1667
3. •
   (literary, no longer used) Causing hindrance or obstruction.

   • But aftervvards, the Gauls ceased to molest and trouble, and the Romans gave over to fear, so soon as they vvere passed, and escaped the rough, cumbrous, and unpassable forrests. — 1659