Thick fog metaphor ... and what each set of circled letters is?

The Thick of It

In the 19th century, the phrase "in thick of it" originated in the British military. It means being fully involved and engaged in a situation. The term gained popularity in the 1920s, especially among British writers.The Oxford English Dictionary defines the word "thick" as having a dense, heavy, or insistent quality. It can also refer to something being difficult to understand or interpret.The phrase "thick as a brick" is a common idiom in British English, meaning something is extremely difficult or insurmountable.

Fog of the Mind

In ancient Greek philosophy, the concept of the "fog of the mind" referred to a state of confusion or uncertainty. It was believed to be caused by excessive mental effort or mental exhaustion.The term "fog" in this context is thought to have originated from the idea of a thick, white substance obscuring the mind.The phrase "fogging the works" is a common idiom in British English, meaning to confuse or obfuscate someone's meaning.

Metaphor

The Greek philosopher Aristotle believed that metaphors were a way to explain complex concepts by equating them with more familiar ones. This idea is still widely used today.The phrase "metaphor" is derived from the Greek word "metaphoros," meaning "one who deploys metaphors."The English word "metaphysical" comes from the Greek word "metaphysis," meaning "beyond the body."

Each

The word "each" comes from the Old French word "chacun," meaning "every one." It was borrowed into Middle English in the 14th century.The word "each" is still used to refer to a single unit or a self-contained thing.The phrase "each and every" is a common adverbial phrase in English, meaning "including all parts" or "including every one."

Set

The word "set" comes from the Old English word "set," meaning "to arrange or position." It is also related to the word "settle," meaning "to make someone or something permanent."The word "set" has also been used in mathematics and physics to describe the arrangement of particles or the position of objects.The phrase "to set a course" means to determine a direction or plan for travel or action.

Circled

The word "circled" comes from the Old English word "cyrce," meaning "to thread or weave." It is also related to the word "circular," meaning "round" or "complete."The word "circular" is still used to describe something that is round or complete.The phrase "to circled" has been used in English since the 15th century to describe the act of drawing or drawing something around something else.

Letters

The word "letter" comes from the Old English word "lēatere," meaning "to write or send." It is still used to describe a unit of writing or communication.The word "letter" is also related to the word "letterbox," a box or container for receiving mail.The phrase "to write a letter" means to compose or send a message or message to someone.