通假 tōngjiǎ
[interchangeability of words or characters] 汉字中的互相通用及假借的用法
同音字或近音字相互通用或假借。古书常用通假字,可包括三种:一、同音通假。如借公为功。二、双声通假。如借果为敢。三、叠韵通假。如借崇为终。
英语 phonetic loan character, using one character interchangeably for phonetically related characters