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ignoramus

[ig-nuh-rey-muhs, -ram-uhs] / ˌɪg nəˈreɪ məs, -ˈræm əs /
NOUN
simpleton
Synonyms
STRONG
blockhead dimwit dunce fool idiot imbecile moron
WEAK
know-nothing numskull
Antonyms
STRONG
brain

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.