The article presents a novel approach to 3D printing of wood using an additive-free, water-based ink composed of lignin and cellulose, the primary components of natural wood. This method, known as direct ink writing (DIW), allows for the creation of architecturally designed wood structures with high resolution and precision. The resulting printed structures, after heat treatment, exhibit visual, textural, olfactory, and mechanical properties similar to natural wood, including thermal stability and anisotropy. The study highlights the potential of this technique for sustainable wood recycling and the fabrication of complex wooden structures. The ink's rheological properties are optimized to facilitate smooth printing, and the 3D-printed wood is further processed through freeze-drying and hot-pressing to enhance its mechanical properties. The results demonstrate that the 3D-printed wood can achieve significant improvements in compressive and flexural strength compared to natural wood, making it suitable for various applications such as decorative and recreational items. The research underscores the recyclability and sustainability of the process, as well as the potential for integrating mechanical reinforcements and functional hybrid structures.The article presents a novel approach to 3D printing of wood using an additive-free, water-based ink composed of lignin and cellulose, the primary components of natural wood. This method, known as direct ink writing (DIW), allows for the creation of architecturally designed wood structures with high resolution and precision. The resulting printed structures, after heat treatment, exhibit visual, textural, olfactory, and mechanical properties similar to natural wood, including thermal stability and anisotropy. The study highlights the potential of this technique for sustainable wood recycling and the fabrication of complex wooden structures. The ink's rheological properties are optimized to facilitate smooth printing, and the 3D-printed wood is further processed through freeze-drying and hot-pressing to enhance its mechanical properties. The results demonstrate that the 3D-printed wood can achieve significant improvements in compressive and flexural strength compared to natural wood, making it suitable for various applications such as decorative and recreational items. The research underscores the recyclability and sustainability of the process, as well as the potential for integrating mechanical reinforcements and functional hybrid structures.