know nothing
[adjective]
Synonyms: ignorant, benighted, empty-headed, illiterate, rude, uneducated, uninstructed, unlettered, untaught, untutored
[noun]
Synonyms: dunce, dimwit, dolt, dope, dummy, idiot, ignoramus, lackwit, pinhead, wantwit

[TahlilGaran] English Synonym Dictionary ▲

know-nothing noun & adjective. ['nǝʊnʌƟɪŋ] In senses A.2, B.2 also Know-Nothing. E19.
[from KNOW verb + NOTHING noun.]
A. noun.
1. a. A person who knows nothing, an ignorant person. E19.
b. A person who holds that nothing can be known; an agnostic. E19.

2. US History. A member of a political party in the US, prominent from 1853 to 1856, which supported exclusion of immigrants from government, and whose members preserved its original secrecy by denying its existence. M19.
b. attrib. or as adjective.
1. a. That knows nothing; grossly ignorant. E19.
b. That holds that nothing can be known; agnostic. E19.

2. US History. Of or pertaining to the American Know-Nothings. M19.

■ know-nothingism noun (a) wilful ignorance; agnosticism; (b) the political doctrine of the American Know-Nothings: M19.

■ know-nothingness noun the state or quality of knowing nothing; complete ignorance: L19.

[TahlilGaran] English Dictionary ▲