Sinewles or Sinewless: How To spell?
The word Sinewles is misspelled against Sinewless, an adjective meaning "Having no sinews; hence, having no strength or vigor."
Sinewless 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:  sinewle-s  Correct Spelling:  sinewle-ss 
Find more wrongly spelled words of Sinewless to spell it well.