A more thorough explanation:

Definition: A group of ten people; a decenary.

Example: In ancient Rome, a decanatus was a group of ten soldiers commanded by an officer called a decanus.

Explanation: The term "decanatus" comes from the Latin word "decem," which means "ten." It was used to refer to a group of ten people or things. In ancient Rome, a decanatus was a group of ten soldiers commanded by a decanus. The decanus was responsible for leading and training the soldiers in his decanatus.

Definition: The act of cutting off a head; a beheading.

Example: Decapitation was once a common method of capital punishment.

Explanation: Decapitation is a form of execution where the head is cut off from the body. It was once a common method of capital punishment, used in many cultures throughout history. In some cases, the head was displayed as a warning to others. Today, decapitation is considered a cruel and inhumane form of punishment and is illegal in most countries.

Definition: A person who has died.

Example: The deceased's family held a funeral to honor their loved one.

Explanation: The term "deceased" is used to refer to a person who has died. It is often used in legal documents, obituaries, and other formal contexts. When someone is referred to as "the deceased," it is a way of acknowledging their death and showing respect for their memory.