close; block; obstruct; stop up
The doctor told him that if he didn't radically change his diet and lifestyle immediately, fatty tissue would soon occlude his arteries and cause a heart attack.
ob (against, up)#claudere (to shut, close) (Latin)
when you include someone they are welcome and the gates are always open but when you OCCLUDE (rhymes with EXCLUDE), they are unwelcome and hence the gates are SHUT or CLOSED on them. Occlude - sounds like conclude. Means close or shut something. Harry Potter fans may remember occlumency which is the subject that helps to close one's mind. clude originates from claudere. which means close.