Simplify the following text for a Grade 9 native English-speaking person.
Original: Nevertheless , according to the Encarta Dictionary and Chambers Dictionary of Etymology , `` dodo '' derives from Portuguese doudo ( currently doido ) meaning `` fool '' or `` crazy '' .
Simplified: The Encarta Dictionary and the Chambers Dictionary of Etymology say `` Dodo '' is a Portuguese word , coming from doido . It means `` fool '' or `` crazy '' .