IPA: /ˈsɪn.ləs/
KK: /ˈsɪn.ləs/
Not having committed any wrong actions or mistakes; pure and innocent.
Many people believe that a sinless life is the ideal to strive for.
Sinless → It is formed from "sin" (from Old English "syn", meaning wrongdoing or transgression) and "-less" (meaning without). The word "sinless" means without sin or free from wrongdoing.
Think of being 'without' ('-less') any 'wrongdoing' ('sin') — that's what sinless means.