noun
Linguistics term for the base form of a word to which affixes are attached.
日本語の動詞の語基は、活用の基本となる部分です。
The base of a Japanese verb is the part that forms the foundation of its conjugation.
語幹 (stem) is the part that remains after removing inflectional endings, while 語基 (base) is a broader term for the core form to which affixes attach.
Compound of 語 (go, 'word') and 基 (ki, 'base, foundation').