Re: How to pronounce at work unit
For me, it can refer only to a physical working space within a bigger space or a specific group of people who have been put together to work on the same project.
Our office space is about 500m2 - it's divided up into ten individual work units.
There are 1000 employees here, separated into twenty work units of 50, each working on a different aspect of the business.
I can't think of any context in which "at work unit" is possible. In response to your specific query, I wouldn't use "work unit" in everyday conversation.
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.