Pronunciation: [dˈɔː nˈɒb] (IPA) 
The correct spelling of the word "door knob" is spelled with a silent "k" at the end of "knob." The IPA phonetic transcription for this word is /dɔː not/ and /nɒb/. The "d" in "door" is pronounced as a voiced dental fricative, while the "kn" in "knob" is pronounced as a consonant cluster made up of a voiced velar stop and nasal consonant. The final "b" in "knob" is silent and not pronounced.
A door knob is a small, typically round, handle or knob that is fixed to a door, used to open and close it. It is an essential component of a door's architectural and functional design, providing a means for accessing and securing a space. Door knobs can be made from a variety of materials including metal, plastic, wood, or glass, and are often designed to match the overall aesthetic of the door or the surrounding environment.
The functionality of a door knob is relatively straightforward. When turned or twisted, it engages with the door latch or locking mechanism, allowing the door to be opened or secured. Door knobs can have different types of latches, such as tubular latches or mortice latches, depending on the style and function of the door. Additionally, door knobs can be designed with keyholes for use with a separate key, primarily for locking purposes such as in external doors or privacy requirements like bathroom doors.
Apart from their practical purpose, door knobs also serve a decorative role, contributing to the overall aesthetics and style of a room or building. They can be ornate or simple in design, with various shapes, patterns, and finishes. Some door knobs may incorporate features like a backplate or rosette, which provide a decorative base for the knob and can help protect the door's surface from wear and tear. Overall, door knobs are crucial architectural and functional elements that facilitate access and security in various spaces.
The word "doorknob" can be broken down into two parts - "door" and "knob".
The term "door" originated from the Old English word "duru" which meant "door or gate". This word has its roots in the Proto-Germanic language, where "dura" was used to refer to a door. The word "door" has remained relatively unchanged over time in different Germanic languages, including Dutch and German.
"Knob" comes from the Middle English word "knobbe", meaning "hard rounded mass or protuberance". It can be traced back to the Middle Low German word "knubbe" or Old High German word "knopfo", both meaning "knob". Ultimately, it is believed to have originated from the Proto-Germanic root word "knubb-", which had a similar meaning.
