Focus on the pronunciation of out of stock
out of stock
adjective (abbreviation OS, O/S) COMMERCE
› products that are out of stock are not available to buy in a store because they have all been sold: You will be notified by email if any part of your order is out of stock.
› if a store is out of stock of a particular product, it has sold all of that product: We will recommend alternative products in the event that we are out of stock of that particular item.