If something concerns you, it is important to you or it worries you.
When you crush something, you press or squeeze it with force to change its shape.
Someone, especially a child, who does not obey the rules is naughty.
Perhaps means ‘maybe’ but is more formal.
If you deliver something it means that you take it and give it to another person.
If something is empty it means that it doesn’t contain anything.
If someone is brave it means that they have a lot of courage and they do things other people won’t do.
A block is a toy for children, shaped as a cube.
When something is above, it means that it is in a higher position.
A joke is a short and funny story that you tell someone to make them laugh.