"watercolours" in the noun sense
1. watercolor, water-color, watercolour, water-colour
water-soluble pigment
2. watercolor, water-color, watercolour, water-colour
a water-base paint (with water-soluble pigments used by artists
3. watercolor, water-color, watercolour, water-colour
a painting produced with watercolors
4. watercolor, water-color, watercolour, water-colour
the art or technique of painting with watercolors
"watercolours" in the verb sense
1. watercolour, watercolor
paint with watercolors
Source: WordNet® (An amazing lexical database of English)
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