timber - trees in a forest regarded as a source of wood. / material wood, (UK) timber, (US) lumber - wood that has been pre-cut and is ready for use in construction.

木口: lumber grade or quality; cut end; wooden grip

木口: a surname

It would be good if~

appraisal / evaluation; assessment / recognition, appreciation

value highly, appreciate / evaluate / appraise

lumber grade, the quality of a piece of wood / cut end (of a piece of wood) / wood handle, wooden grip

入り口, 入口: entrance

casual talk, usage of an informal speech style

出口: exit