Incorrect spelling, explanation: preety is a misspelling because of the origins of the word: Old English prættig, Middle English pratte, prettie. Although pronunciation may be misleading, pretty, with double t, is the correct spelling.

Correct spelling, explanation: for non-English native speakers this spelling may be misleading as the correct form pretty is pronounced as [prɪti] and double e is often pronounced like i, so preety is a common mistake. However, word pretty derives from Old English prættig, spelled with double t. Therefore pretty is correct and preety is a misspelling.

Definition of pretty:
1. adjective, attractive, handsome, pleasant to the eye
She is a very pretty girl, but also modest.
2. adverb, fairly, moderately. Note: this meaning is much younger; used from the late 16th century; it is also informal but not limited to the common language.
Your idea is pretty clever! We should try it.

Incorrect spelling

Incorrect spelling