noun
origin; source; cause; beginning
Refers to the starting point, root cause, or genesis of something. Often used in formal or explanatory contexts.
この伝統の起こりは江戸時代にさかのぼる。
The origin of this tradition dates back to the Edo period.
事故の起こりは小さなミスだった。
The cause of the accident was a small mistake.
Noun form of the verb 起こる (to occur, to happen), from the stem 起こり. The kanji 起 means 'to rise' or 'to start'.