Marowing or Marrowing: How To spell?
The word Marowing is misspelled against Marrowing, which is present continuous of "Marrow"
Marrowing has double "rr" is mispronounced as "r"Remember double 'RR' in between the strings ma & owing which should not be misspelled with single 'R'
Wrong Spelling:  ma-r-owing  Correct Spelling:  ma-rr-owing 
Find more incorrect spellings of Marrowing to spell right way.