Souterain or Souterrain: How To spell?

The word Souterain is misspelled against Souterrain, a noun meaning "A grotto or cavern under ground."

Souterrain has double "rr" is mispronounced as "r"
Remember double 'RR' in between the strings soute & ain which should not be misspelled with single 'R'
Wrong Spelling:  soute-r-ain 
Correct Spelling:  soute-rr-ain 
Check more misspelled words of Souterrain to spell it correct.

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