Definition of "obstructive"

The obstructive tendency attributed to the knot in spiritual matters appears in a Swiss superstition that if, in sewing a corpse into its shroud, you make a knot on the thread, it will hinder the soul of the deceased on its passage to eternity.

1911, James George Frazer, chapter V, in Taboo and the Perils of the Soul (The Golden Bough: A Study in Magic and Religion; II), third edition, London: Macmillan and Co., Limited, page 310