battlements is a form of:

Battlement



noun
1.
(An indented wall at the top of a building or tower, constructed with openings through which, in olden times, men shot at their enemies) ក្បាច់ត្របកឈូក, ជញ្ជាំងពួនបាញ់, បង្កាន់ដៃ, រន្ធតាមកំពែង (សម្រាប់បាញ់សត្រូវ)
ENGLISH MEANING
noun
1.
One of the solid upright parts of a parapet in ancient fortifications.
2.
(PLURAL) The whole parapet, consisting of alternate solids and open spaces. At first purely a military feature, afterwards copied on a smaller scale with decorative features, as for churches.