STUPID/NOT INTELLIGENTsomeone who has a very low level of intelligence 智力低下的人,傻子,蠢人
Examples from the Corpus
simpleton• He did not in the least wish the future Mrs Newland Archer to be a simpleton.• Like some bloodysimpleton he was being drawn in.• The merestsimpleton could draw the conclusion.• The courts accept that ordinaryreaders are not literal-minded simpletons.
Originsimpleton
(1600-1700)simple + -ton (probably as in names like Washington)