Obstruct
Chamber's Etymological of the English Language · 1895 · p. 356
ob-strukt', v.t to block up to hinder from pa ing to retard (X. ob, in the way of, struo, st rueturn, to pile up.] Obstruction, ob-struk's hun, n act of obstructing that which obstructs obstacle impediment. mote mflte mOBn then. 356 Obstructive
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