parapet

noun
1
a low wall along the edge of a bridge, a roof, etc. to stop people from falling
جان‌پناه, دیواره, لبه‌ی محافظ, حصار کوتاه, دیوار کوتاه
2
a wall or barrier placed in order to protect soldiers from being shot
سنگر, جان‌پناه, لبه‌بارو, دیوار محافظ
(figurative)He was not prepared to put his head above the parapet and say what he really thought .