underbark (English) comes from English bark, from Middle English bark, from Old English barc, from Old Norse bǫrkr, from Proto-Germanic barkuz, from Proto-Indo-European bʰerHǵós — birch.
underbark (English): The inner layer of tree bark, beneath the...
Definitions
The inner layer of tree bark, beneath the...
Ancestry of “underbark”, step by step
underbark traces back through two separate lines of ancestry.