noun
Refers to the painting technique or the artwork itself. Often used in compounds like 水彩画 (watercolor picture) or 水彩絵の具 (watercolor paints).
彼女は水彩で風景を描くのが好きだ。
She likes to paint landscapes in watercolor.
この展覧会には美しい水彩がたくさん展示されている。
Many beautiful watercolors are exhibited at this exhibition.
From 水 (water) + 彩 (coloring), referring to painting with water-soluble pigments.