Impenes or Impennes: How To spell?
The word Impenes is misspelled against Impennes, a noun meaning "An order of birds, including only the penguins, in which the wings are without quills, and not suited for flight."
Impennes has double "nn" is mispronounced as "n"Remember double 'NN' in between the strings impe & es which should not be misspelled with single 'N'
Wrong Spelling:  impe-n-es  Correct Spelling:  impe-nn-es 
Explore spell check of Impennes to spell without errors.