Origin: 1150–1200;Middle English < Latininnocent- (stem of innocēns) harmless, equivalent to in-in-3 + nocēns present participle of nocēre to harm; see -ent; cf. noxious
Synonyms 1. sinless, virtuous; faultless, impeccable, spotless, immaculate. 2. Innocent, blameless, guiltless imply freedom from the responsibility of having done wrong. Innocent may imply having done no wrong at any time, and having not even a knowledge of evil: an innocent victim.Blameless denotes freedom from blame, especially moral blame: a blameless life.Guiltless denotes freedom from guilt or responsibility for wrongdoing, usually in a particular instance: guiltless of a crime.6. simple, naive, unsophisticated, artless.
1340, "doing no evil, free from sin or guilt," from O.Fr. innocent (11c.), from L. innocentem (nom. innocens) "not guilty, harmless, blameless," from in- "not" + nocentem (nom. nocens), prp. of nocere "to harm" (see noxious). Meaning "free from guilt of a crime or charge"
is from 1382. The earliest use was as a noun, "person who is innocent of sin or evil" (c.1200).