In other words changing the meaning of words or sentences. It happens a lot and sometimes we don't realize it's been tampered with. But we have warnings about it in the Bible. God's Word is Sacred and we don't have any business playing around with it. It says what it means and we should take it as it reads.
Deuteronomy 4:2 "Ye shall not add unto the word which I command you, neither shall ye diminish ought from it, that ye may keep the commandments of the Lord your God which I command you."
Deuteronomy 12:32 "What thing soever I command you, observe to do it: thou shalt not add thereto, nor diminish from it."
Proverbs 30:6 "Add thou not unto His words lest He reprove thee, and thou be found a liar."
Revelation 22:19 "And if any man shall take away from the words of the book of this prophecy, God shall take away his part out of the book of life, and out of the holy city, and from the things which are written in this book."
It sounds pretty serious to me to tamper with God's word, don't you think? Let's be very careful when we study His word that we don't try to change the meaning of things to our way of thinking, because we could have been taught wrong. Careful study is the way to search the Scriptures. Grandma Joan