gouachenoun
/ɡuˈɑːʃ//ɡuˈɑːʃ/specialized[ U ] a method of painting that uses colours mixed with water and a substance to make them thicker:
Illustrator Lynne Avril Cravath used gouache and coloured pencils to create the delightfully vibrant, playful illustrations.
[ C ] a painting that is produced using this method:
Among the most important works here are the gouaches made from 1927 to 1928.