Naughty = naught (pronoun) + suffix –y
1. na, variant of NO (not, by no means)+ wight (OE:wiht; a living being, a creature)
2. ne (not)+ aught (OE:áwiht; anything)
-> naught = not anything, nothing
-> pronoun -> noun -> adjective
Development of the meaning:
NAUGHT AS AN ADJECTIVE:
- usually in predicative use, today archaic
- meaning: WORTHLESS, MORALLY BAD, HARMFUL
-15th century - having or possessing nothing.
-15th – 18th century: morally bad, wicked
-16th century –now: immoral, promiscuous, sexually provocative.
-17th century – now: mischievous, disobedient.
-19th century - now: naughty corner