Say it with a /zzzzz/ /kləʊz/
When “close” means the opposite of “open”, as to open and close something, please pronounce the “s” as a “z”. For example, a closed [z] door.
Say it with an /ssssss/ /kləʊs/
When “close” refers to a distance, either in the concrete sense (as meters, kilometers…) or in a less easily defined notions of space and time (relationships, position), pronounce the “s” as an “s”. For example: a close [s] working relationship.
Examples of /kləʊz/ :
- I closed my emails.
- The case has been closed.
- The meeting drew to a close.
- Many stores have closed down and gone out of business in the recent years.
Examples of /kləʊs/:
- The shopkeeper stood close to the cash register.
- Our chalet is close to the slopes.
- We are close friends.
- This experience will remain close to my heart.