Placidnes or Placidness: How To spell?
The word Placidnes is misspelled against Placidness, a noun meaning "The quality or state of being placid."
Placidness has double 'ss' in the end mispronounced as 's'Remember double 'SS' appears in the end of this word which should not be misspelled with single 'S'
Wrong Spelling:  placidne-s  Correct Spelling:  placidne-ss 
Find more wrongly spelled words of Placidness to spell it well.