Thanks for the suggestion! There are several rules and considerations in play.
For testing juke, I’d take a look at any words in the alphabet that could conflict with it on either side:
> air bat cap drum each fine gust harp sit jury crunch look made near odd pit quench red sun trap urge vest whale plex yank zip
I see: cap, each, gust, crunch, quench
I’d say “juke cap juke each juke gust ....” out loud to test it. I’d also test it out loud against every word in the alphabet if it passes the obvious collisions.
Ultimately juke doesn’t pass for me for two reasons:
1. ook is something of a glottal sound, it can be awkward to reset your mouth afterwards when flowing into another letter
2. When chaining with some of them other letters in the alphabet it can sound like you’re saying “Jew”, and it may be confusing to some people if you are saying that repeatedly. “Juice” had a similar effect.