Deceitful a. : Full of, or characterized by, deceit; serving to mislead or insnare; trickish; fraudulent; cheating; insincere.

Example:
What is best way to deal with an online advertiser whose ad is Deceitful and misleading?

Taxonomy
Merriam-Webster Online Dictionary, ceit, ful, Dictionary, webster, Word Games, Webster Online Dictionary with audio pronunciations, thesaurus, Google Search, Custom Search, glossary, english, language, ESL, Search, adjective, 15th century, tendency.

Defination from the web:
deceitful from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games. ... having a tendency or disposition to deceive: a : not honest <a deceitful child> b : deceptive, misleading <deceitful advertising> synonyms see dishonest ...