The term 'as is proper' can be broken down into five crossword solutions: DULY (4 letters), APTLY (5 letters), PRIM (4 letters), PRUDE (5 letters), and Fitly (5 letters). DULY means in a timely manner, while APTLY means suitably or appropriately. PRIM means proper or precise, and PRUDE means excessively modest or proper. Finally, Fitly means suitably or appropriately. Together, these words describe the phrase 'as is proper, ' which means to do something in an appropriate or expected way.