A more thorough explanation:

A secondary amendment is a type of amendment proposed or made to a statute, constitution, pleading, order, or other instrument. It is a change made by addition, deletion, or correction, especially an alteration in wording.

• Amendment by adding: An amendment that places new wording at the end of a motion or of a paragraph or other readily divisible part within a motion.
• Amendment by inserting: An amendment that places new wording within or around a motion's current wording.
• Amendment by striking out: An amendment that removes wording from a motion's current wording.
• Amendment by striking out and inserting: An amendment that removes wording and replaces it with alternative wording.
• Amendment by substituting: A special type of amendment by striking out and inserting that replaces an entire main motion or a paragraph or other readily divisible part within a main motion.

For example, an amendment by adding could be adding a sentence to a proposed law. An amendment by inserting could be adding a word or phrase to a sentence in a proposed law. An amendment by striking out could be removing a sentence from a proposed law. An amendment by striking out and inserting could be replacing a sentence in a proposed law with a new sentence. An amendment by substituting could be replacing an entire section of a proposed law with a new section.

These examples illustrate how a secondary amendment can change the wording of a proposed law or motion, either by adding, inserting, striking out, or substituting text.