This is the 13423rd most frequent German word.
bemalen
"Bemalen" means "to paint on something."
'Bemalen' is used to describe the action of painting a surface with colors.
Die Kinder bemalen die Wand mit bunten Farben.
The children are painting the wall with bright colors.
Here 'bemalen' indicates decorating an object, the Easter egg, by painting on it.
Er hat das Osterei mit Mustern bemalt.
He painted the Easter egg with patterns.
In this case, 'bemalen' refers to repainting or altering the appearance of furniture by painting it.