obtruncate
To truncate or lop the head off, to decapitate (also figurative).
obsolete
Rustic chairs and benches are scattered about, some of them ponderously fashioned out of the stumps of obtruncated trees, and others more artfully made with intertwining branches, or perhaps an imitation of such frail handiwork in iron.
Where it comes from
Borrowed from Latin obtruncātus, perfect passive participle of obtruncō, see -ate (verb-forming suffix).
Adapted from the Wiktionary entry obtruncate (CC BY-SA 4.0).