Mixing Business with Love?

It's commonly advised "don't mix business with pleasure," which generally means it's not a good idea to date a co-worker.  But there are a few words we use for business that also go along with the theme of love.  For example, a proposal can be an offer of marriage or a business proposition presented for others to consider.  Engagement can mean customers connecting and interacting with a product or website, or the period of time before a marriage takes place where the couple has agreed to marry.
Here's some help pronouncing these two business and love words.