从文字学的角度来说,每一个时代都存在着文字同形的现象。这些偏旁首先可能来源不同,后来由于各种原因,或讹变、或省简等,这些字形渐渐趋于相同,这就给后来的释字带来一些难度。例如火和亦,火战国文字作■(郭店唐虞),与亦字■(孴録10·1)、■(郭店太一)的形体很相似;甲和亡,楚文字中“甲”作■(老子甲29)、■(周易18),“亡”作■(语丛三20)、■(语丛三64),两字的写法极其相似, From a philological point of view, there is a phenomenon of the same character in every era. These radicals may first come from different sources. Later, the glyphs gradually tend to be the same for various reasons, or because of various reasons, such as simplification or simplification, which brings difficulties to subsequent interpretations. For example, fire and fire are also written in ■ ■ (Guodian Tang Yu), and also the word ■ (recorded 10.1), ■ (Guo Dian a) is very similar to the body; A and death, Chu text “I ■ for ■ (Lao Zi A) 29 ■ ■ (Zhou Yi 18), ” death "for ■ ■ (language bundle three 20), ■ (language bundle three 64), the wording of the word is extremely similar,