lumbering

/L AH1 M B ER0 IH0 NG/
noun
  1. 1

    The act of one who lumbers; heavy, clumsy movement.

  2. 2

    The business of felling trees for lumber.

adjective
  1. 1

    Clumsy or awkward.

  2. 2

    Heavy, slow and laborious; ponderous.

Source: https://en.wiktionary.org/wiki/lumbering