Obstructio, ônis. f. g. Verbale. Cic.A stopping: obstruction.
Lewis and Short: Latin dictionary
ob-structĭo, ōnis, f. [obstruo], a building before or against, a closing up by building, a blocking up. I.Lit. (post-class.): corporum, Arn. 2, 63.—II.Trop., an obstruction, a barrier: haec obstructio non diuturna est, Cic. Sest. 9, 22.