niffies is a form of:

Palisade



noun
1.
(a fence of stakes or railings; line of steep cliffs or railings. line of steep cliffs which looks some shat like such a fence) របងការពារ (ធ្វើដោយបង្គោលឬចំរឹង)
ENGLISH MEANING
noun
1.
A strong, long stake, one end of which is set firmly in the ground, and the other is sharpened; also, a fence formed of such stakes set in the ground as a means of defense.
2.
Any fence made of pales or sharp stakes.
3.
A line of bold cliffs, esp. one showing basaltic columns; -- usually in pl., and orig. used as the name of the cliffs on the west bank of the lower Hudson.
verb
1.
(TRANSITIVE) To surround, inclose, or fortify, with palisades.