appetiteless

From appetite +‎ -less.

appetiteless (not comparable)

1. Devoid of appetite.
   • 1911, Saki (H H Munro), Filboid Studge, the Story of a Mouse That Helped

     "You haven't eaten your Filboid Studge!" would be screamed at the appetiteless clerk as he hurried weariedly from the breakfast-table, and his evening meal would be prefaced by a warmed-up mess which would be explained as "your Filboid Studge that you didn't eat this morning."