weir
bonds; fetters; ties of obligation
「柵」 has another reading with different meanings.
fence; paling; railing
危険なので柵に近づかないで。
Don't go near the fence, it's dangerous.
人間関係のしがらみから逃れたい。
I want to escape the bonds of human relationships.
柵が壊れて動物が逃げ出した。
The fence broke and the animals escaped.