innocent

(noun): One who is innocent, especially a young child.
(noun): A harmless simple-minded person; an idiot.
(adjective): Free from guilt, sin, or immorality.
(adjective): Bearing no legal responsibility for a wrongful act.
(adjective): Naive; artless.
(adjective): (obsolete except medicine) Not harmful; innocuous; harmless; benign.
(adjective): (with of) Having no knowledge (of something).
(adjective): (with of) Lacking (something).
(adjective): Lawful; permitted.
(adjective): Not contraband; not subject to forfeiture.