「互」字字源，舊主要有自「牙」分化與自「巨」分化兩說。根據長沙五一廣場東漢簡牘用為互相之「互」與用為「䇘」的特殊字形，可以斷定應以自「巨」分化說為是。傳世醫書的「巨刺」本即「互刺」，係更早用字習慣與字形之遺。出土文獻中舊有個別被釋讀為「巨（矩）」或「巨（拒）」之字，亦可據此新釋讀作「互」及「互（枑）」。

　　The origin of the character hu(互) traditionally has two main theories: one suggesting its derivation from ya(牙) and the other from ju(巨). Based on the distinctive form found in the Wuyi guangchang Eastern Han bamboo slips—where it used as hu(互) (mutual) and also as hu(䇘) (a type of tool)—it can be concluded that the theory of its derivation from ju(巨) is correct. The term ju-ci(巨刺) found in received medical texts is actually hu-ci(巨刺), representing a vestige of earlier writing habits and character forms. In light of this new understanding, a few graphs in excavated texts that were previously transcribed as ju(巨) (reading ju[矩] or ju[拒]) can now be recognized as hu(互) (reading hu[互] or hu[枑]).

互; 巨; 字源; 分化; 巨刺; 互刺

hu(互); ju(巨); character origin; graphic derivation; ju-ci(巨刺); hu-ci(互刺)