甲骨文字變形極多，卻仍能為人所辨識，顯示其中必有不變的特徵。前人研究甲骨文中部件的意義有認為相同，也有認為不同；但是有些解釋太過牽強。本文引入流體力學及拓樸學的觀念，針對前人討論過的「舟」、「般」、「盤」、「凡」、「風」、「鳳」、「服」、「受」、「前」、「朕」等字中該部件之意義加以闡明。至於同與不同端視觀察者所使用的工具、語言及抽象化的程度而定；難以一言蔽之。
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