1. start-begin-outset-onset
Outset refers to the beginning of an action or event, often when the said event/action has already started. Onset is typically used to refer to a beginning of an unpleasant action or event.
https://www.differencebetween.com/difference-between-onset-and-vs-outset/
原文：https://www.cnblogs.com/xudongdong/p/12319063.html