"Know-it-all" Natural Recordings by Native Speakers
A know-it-all is a person who thinks they know more than others, often to the point of being pompous or arrogant. They tend to dominate conversations, interrupt others, and may not listen to opposing views or advice. Despite their claims of expertise, they may not actually have the knowledge or experience to back up their assertions.
The word "knottiest" is a superlative form of the adjective "knotty". A knot is a tangled or complicated problem or situation. The superlative "knottiest" refers to the most complicated or difficult problem or situation of all. It can also be used to describe the most difficult or tedious task or situation. For example, "The question on the exam was the knottiest one I've seen all year." Alternatively, " Trying to learn this complex software was the knottiest task I've faced recently."