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Something bounces when it hits a surface and then springs back in another direction.
The ball in the picture is bouncing along the pavement.
Bis forBow (motion)
Bowing is a way of greeting or acknowledging someone, or a mark of respect. You bow by lowering the top half of your body. In some countries, you can bow just by lowering your head.
Bis forBuck (horse)
You build something when you make it by putting together lots of smaller parts. The woman in the picture is building something out of lego.
Used as a verb, you bump into something when you hit it, but not especially hard. You might bump your knee on your coffee table if you are walking around your living room in the dark.
As a noun, a bump is a raised, slightly rounded area on something else. The stone pillar in the picture has a lot of bumps carved into it.
A burden is a heavy load someone is carrying. A burden may be a physical one, such as the load the man in the picture is carrying, or it may be an emotional burden.
You can use burden as a verb too, for example, "he burdened her with his secrets".
