JEWell, "yearny" doesn't appear in my Chambers dictionary, and I bet it isn't an Official Scrabble Word either. However, I know exactly what it means. Of course it's also begging to be used in a song on the lines of "Yearny one morning, just as the steam was rising....." (though that probably means that some adolescent spotty youth had got up early to write down train numbers in a notebook).
Kitty