Made of birch wood or relating to birch trees.
From Old English 'birce' (birch tree) plus '-en' (made of), following the pattern of 'wooden,' 'golden,' etc.
In old poetry, 'birchen' appears in descriptions of simple tools and vessels—it reflects how birch was the working person's wood, humble but incredibly useful!
Complete word intelligence in one call. Free tier — 50 lookups/day.