• 作品さくひん — (artistic) work, piece
• 作家さっか — author, writer
• 作文さくぶん — composition, essay
• 操作そうさ — operation, handling
• 作法さほう — manners, etiquette

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作 is a 会意 (compound ideograph) composed of 亻 (person) and 乍 (to begin, suddenly), suggesting “a person doing something” — the act of creating or producing.

私わたしが 朝あさごはんを作つくります。
I make breakfast.

この作品さくひんは 有名ゆうめいです。
This work is famous.