onset
- n. 开始，着手；发作；攻击，进攻
考试真题
- The incidence of new chronic illness onset increased over time as well, with more husbands than wives developing serious health problems.
2019年6月四级真题（第一套）阅读 Section C
- The researchers examined how the onset of four serious physical illnesses affected marriages.
2019年6月四级真题（第一套）阅读 Section C