Closing, Closure, Shutdown, Lockout, Unsociable
noun, verbal noun, の adjective
A closed chain lets everyone know that a building or store is closing for good. It's got to lockout everyone so they won't try to get in anymore.
へいさ
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
このプールは今月で閉鎖されます。
The pool is closed this month.