know-nothing

Adjective

not-comparable

Ignorant; characterized by foolish denial of facts or beliefs in that which is not true.

Japanese Meaning

無知な者 / 愚かに事実を否定する人

Her know-nothing attitude during the meeting frustrated everyone who had prepared detailed proposals.

会議での彼女の無知な態度は、詳細な提案を用意していた全員を苛立たせた。

Sense（1）

Ignorant; characterized by foolish denial of facts or beliefs in that which is not true.

All over the world, know-nothing xenophobes are claiming – without evidence – that climate science is rigged.