Know nothing and Unrefined

Know nothing noun - An ignorant person.

Unrefined and know nothing are semantically related. in lacking knowledge topic. In some cases you can use "Unrefined" instead an adjective phrase "Know nothing".

Unrefined adjective - Being such as found in nature and not altered by processing or refining.

Know nothing and unrefined are semantically related. Sometimes you can replace phrase "Know nothing" with "Unrefined", this terms are similar.