All 3 Uses of

obstruct
in
The Hunchback of Notre Dame

We shall not try to give the reader an idea of that tetrahedral nose, that horseshoe mouth; that little left eye obstructed with a red, bushy, bristling eyebrow, while the right eye disappeared entirely beneath an enormous wart; of those teeth in disarray, broken here and there, like the embattled parapet of a fortress; of that callous lip, upon which one of these teeth encroached, like the tusk of an elephant; of that forked chin; and above all, of the expression spread over the whole; of that mixture of malice, amazement, and sadness.†
Chpt 1.1.5

obstructed = blocked or interfered

"Accursed Parisians!" he said to himself (for Gringoire, like a true dramatic poet, was subject to monologues) "there they are obstructing my fire!†
Chpt 1.2.3

obstructing = blocking or interfering

The customs of the provostship and the viscomty had not yet been worked over by President Thibaut Baillet, and by Roger Barmne, the king's advocate; they had not been obstructed, at that time, by that lofty hedge of quibbles and procedures, which the two jurisconsults planted there at the beginning of the sixteenth century.†
Chpt 1.6.1 *

obstructed = blocked or interfered

Definition:

to block, slow down, or interfere with movement, progress, or action

The exact meaning of obstruct can depend upon its context. For example: