Weir (noun) — سد صغير: A low dam across a river. Below are 6 words with a similar meaning; the linked ones have full GL Dictionary entries with their meaning in Arabic.
water barrier; obstruction; blockage; retention structure; flood control; water containment; hydroelectric barrier; river obstruction
A concentrated attack; a continuous outpouring; an artificial barrier; heavy gunfire; an overwhelming amount
Something that blocks movement or progress — a physical fence or an abstract obstacle
sluicelockdyke