A stroke of a kanji character—the individual pen/brush movement that composes a character.
この漢字は三画目が難しい。
The third stroke of this kanji is difficult.
漢字の画数を数えて練習した。
I practiced by counting the strokes of kanji.
習字の授業で正しい画順を学んだ。
In calligraphy class I learned the correct stroke order.