Genesis 7:21

Many years later, Jesus Christ used this event to teach people. It tells us about the end of the world. (See Matthew 24:37-39.) Before the flood, people lived in an ordinary way. They ate and they drank. They married wives. They did not know that the flood would come. Then the flood came and it killed them. Jesus said that the end of the world will be like that. People who do not know God will live in an ordinary way. They will eat and they will drink. They will marry wives. They will not know that Jesus will come back again. And what happens then will be like the flood. But anybody who continues to trust God will be safe. (See Matthew 24:13.)

For ‘clean’ animals, see the comment on verse 2.

Lord ~ a lord is a person who has authority. ‘The Lord’ means God. It is a translation of God’s name. The Hebrews wrote God’s name as YHWH. We may write it as Yahweh.

Hebrew ~ the Hebrew people were Abraham and his descendants. The ancient Hebrew language is the original language of Genesis. It is also the original language of most of the Old Testament (the first part of the Bible). This language is like the modern Hebrew language, which people speak in the country Israel today.

descendants ~ children and grandchildren and later members of the family.
ark ~ an ark is a box. The ark in Genesis was a very big box that floated on water like a ship.
command ~ to tell people (or a person) that they must do something; to say to people (or to a person) something that they must obey; to control by means of commands. A command is an order that one must obey.