timber

1. Trees in a forest regarded as a source of wood.
2. (outside North America) Wood that has been pre-cut and is ready for use in construction.
3. A heavy wooden beam, generally a whole log that has been squared off and used to provide heavy support for something such as a roof.

   the timbers of a ship

4. Material for any structure.
5. The wooden stock of a rifle or shotgun.
6. A certain quantity of fur skins (as of martens, ermines, sables, etc.) packed between boards; in some cases forty skins, in others one hundred and twenty. Also timmer, timbre.

1. To fit with timbers.

   timbering a roof

2. To construct, frame, build.
3. To light or land on a tree.
4. To make a nest.
5. To surmount as a timber does.

interjection

Used by loggers to warn others that a tree being felled is falling.