ten 十^jōyō (here numerous) + spread 尃^hanzi (measure/hand 寸^jōyō + rice plant with exaggerated roots → protect plant, note that while it is similar to exclusive 専^jōyō (child has a spinning toy), it's a completely different etymology) → plant on wide area → spreading wide → extensive, also profit/gamble (from using all fingers to grab spread out profit)