[ʃә'vәudә'fri:z]
防栅

[ noun ]
defensive structure consisting of a movable obstacle composed of barbed wire or spikes attached to a wooden frame; used to obstruct cavalry
<noun.artifact>

Cheval-de-frise \Che*val"-de-frise"\, n.; commonly used in the
pl. {Chevaux-de-frise}. [F.; cheval horse + Frise Friesland,
where it was first used.] (Mil.)
A piece of timber or an iron barrel traversed with
iron-pointed spikes or spears, five or six feet long, used to
defend a passage, stop a breach, or impede the advance of
cavalry, etc.

Obstructions of chain, boom, and cheval-de-frise. --W.
Irving.