A prefix. (Example: Patient. The prefix is Im-. So, if you add Im- to Patient, you get Impatient.)
That is a prefix.
I think you mean a prefix.
a small group (5 letters)
A group of postal letters is called a mail or a batch of mail.
A word. Many groups of letters is called a sentence(:
A group of trees is called a wood from which a forest area could be called a woodland.
prefix
prefix
A group of paper is typically called a stack. It refers to a collection of papers placed one on top of the other.
set
Company, ensemble.
In the army, a company consists of a group of soldiers. It begins with the letters co.
Acronym
it is called simply a group of kings and queens!!