The word “know” has a long and complicated history. It can be traced back to the Proto-Indo-European root *gno-, which meant “to know.” This root gave rise to a few different words in various Indo-European languages, including the Latin word gnōscō, from which our English word is derived. The original meaning of *gno- was something like “to understand,” or “to have knowledge of.” Over time, this sense developed into the more specific meanings we now associate with the word, such as “to be aware of,” or “to recognize.”
The precise origins of the English word are unclear, but it is first attested in Old English in the early ninth century. At that time, it had two main senses: “(1) to have sexual intercourse with; (2) to learn about someone or something by personal experience.” These senses are still found in modern usage (though often with a slightly different connotation), but over time other senses have developed as well. Today, we also use know to mean things like “(1) to be certain about something; (2) to be familiar with someone or something; (3) to possess skills or information; etc.”
Then, the meaning of knowledge has changed over time. But what hasn’t changed is its importance: even today, knowing remains one of the most essential human activities. Whether we’re trying to understand our world or ourselves – whether we’re seeking knowledge for its own sake or for some practical purpose – it’s an activity that lies at the heart of what it means not just simply existing but fully living.
The definition of the word “know” can be difficult to pin down, as it is such a versatile word. Though, when we say that we know something, we mean that we are certain of it – either because we have seen or experienced it ourselves, or because someone else who is reliable has told us about it.
There are various levels of knowing something too. For example, you might know that the sun will rise tomorrow just because you’ve seen it happen every day for your whole life. But if someone asked you why the sun rises tomorrow, you wouldn’t be able to give them a scientific explanation – even though you still know that it will happen.
Whether or not something can be said to be known depends on how confident we feel in our understanding of it. And since human beings are fallible creatures, there will always be things in the world that nobody knows for sure – which is part of what makes life so interesting!
The root word of “know” is “knowledge.” Knowledge is the sum of what we know. It includes everything we have learned, experienced, or been taught. It is the foundation upon which all our beliefs and opinions are based.
Knowledge is also dangerous. It can be used to manipulate and control others. It can be used to justify terrible acts in the name of ideology or religion. That is why it is so important that we use our knowledge wisely and for good.