Perisci or Periscii: How To spell?
The word Perisci is misspelled against Periscii, a noun meaning "Those who live within a polar circle, whose shadows, during some summer days, will move entirely round, falling toward every point of the compass."
Periscii has double 'ii' in the end mispronounced as 'i'Remember double 'II' appears in the end of this word which should not be misspelled with single 'I'
Wrong Spelling:  perisc-i  Correct Spelling:  perisc-ii 
Find more wrongly spelled words of Periscii to spell it well.