green wood; unseasoned wood
Wood that has not been dried or seasoned; still contains moisture and is not ready for use in construction or woodworking.
Furniture made from green wood may crack later.
生木 is a living, green tree or freshly cut wood, the opposite of the dead, dried-out 枯れ木.
Compound of 生 (なま, 'raw, fresh, live') and 木 (き, 'tree, wood'). The reading なまき follows standard rendaku rules.