How do you pronounce thorough?

ˈθɜːrəʊ

Here's a breakdown:

* ˈθɜː is a "th" sound, like the "th" in "thin"

* rəʊ is a combination of "er" and "oh", like the "er" in "her" followed by the "oh" in "go"

So, it sounds like "thur-oh".