lumber

From Wiktionary

Pronunciation[change]

Noun[change]

Singular
lumber

Plural
none

Lumber
  1. (uncountable) Lumber is wood that is cut up into planks.
    The frame of the house is made of lumber.

Verb[change]

Plain form
lumber

Third-person singular
lumbers

Past tense
lumbered

Past participle
lumbered

Present participle
lumbering

  1. If you lumber, you move clumsily and slowly.