Not know
Understand
Understand verb - To form an opinion or reach a conclusion through reasoning and information.
Not know is an antonym for understand.
Both terms in one sentence
- You have Gandalf the White, a being of such power and wisdom that you could not know or understand a fraction of his thoughts, who was sent back by Eru himself to face your Master's evil after fighting a dark creature of the same order as your Master to the death.
Source: Shut Up Hannibal / Fan Works - Since Nicky does not know Italian, it takes him days to understand that he is being insulted.
Source: Pretender Diss -
Book Dumb: Rin does not know who Ophelia is and has to ask Seitaro about how to read or understand a lot of things she comes across.
Source: Video Game / Mermaid Swamp
Cite this Source
Understand and Not know. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/not_know/understand
Not know & Understand. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/not_know/understand>.
Understand or Not know. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/not_know/understand.
Google Ngram Viewer shows how "not know" and "understand" have occurred on timeline