Here's a breakdown of the pronunciation:
* "hed": Like the word "head" but with a slightly softer "d" sound.
* "ukh": Similar to the "uck" sound in "luck," but with a slightly more open "o" sound.
It's important to remember that Welsh pronunciation is a bit different from English, so it's best to listen to a native speaker to get the exact sound. You can find recordings of the word "heddwch" on websites like Forvo or YouTube.