佛陀用以自稱的一個稱號，註釋書對其提出八種或更多解釋而莫衷一是，此詞早於佛教已存在，且不限於佛陀，任何阿羅漢皆可用之。

An epithet the Buddha used of himself, on which the commentaries offer eight or more explanations without settled agreement, noting the term predates Buddhism and can apply to any Arahant, not only a Buddha.