Pronunciation: [nˈə͡ʊ ɒv] (IPA) 
The spelling of the phrase "know of" is straightforward as it is pronounced exactly as it appears. The phonetic transcription for "know" is /noʊ/ while "of" is /ʌv/. The "k" sound in "know" is not silent, and the "w" is pronounced as /w/ rather than /v/ sound. "Of" is pronounced as a short "u" sound followed by "v." Together, "know of" is pronounced as /noʊʌv/. It means to be aware or have knowledge of something.
"Know of" is a phrasal verb that is commonly used in English to indicate awareness or familiarity with someone, something, or a piece of information. It implies a level of knowledge that may not be very extensive or detailed.
When used in the context of people, "know of" refers to being acquainted with an individual's existence or reputation, but not necessarily having a personal relationship or deep understanding of them. For example, if someone asks if you know of a famous actor, it means they are inquiring if you are aware of their existence and who they are, even if you do not personally know or have interacted with that actor.
Similarly, when "know of" is used in relation to things or objects, it signifies recognition or acknowledgment of the existence or characteristics of a particular item. For instance, if someone asks if you know of a good restaurant in town, they are requesting information about your awareness of any suitable dining establishments that you might be familiar with.
In summary, "know of" suggests a moderate level of knowledge or familiarity with someone, something, or a piece of information, indicating a degree of awareness or recognition without necessarily implying a deep understanding or personal relationship.
The phrase "know of" is a combination of two words: "know" which comes from the Old English word "cnāwan" and "of" which comes from the Old English word "of" or "off".
The word "know" has evolved from the Old English verb "cnāwan" meaning "to recognize" or "perceive", which in turn comes from the Proto-Germanic word "knēaną". This ancient root has also influenced related words like "knowledge" and "known".
The word "of" has its origins in Old English, where it was spelled as "of" or "off". It is derived from the Proto-Germanic word "af" which has the basic meaning of "from" or "away". This term has various uses, including indicating possession or connection. Over time, "of" has become a versatile preposition in English.
