Persist的同源词
* assist
v. 协助，帮助
You will be employed to assist in the development of new equipment.
你将受聘协助开发新设备。
* assistant
n. 助理；助手
a senior research assistant
高级研究助理
My assistant will now demonstrate the machine in action.
现在我的助手将演示机器运转情况。
* consist
v. 由某事物组成或构成
The committee consists of ten members.
委员会由十人组成。
a mixture consisting of flour and water
面粉和水的混合物。

* exist
v. 发生; 存在
The custom of arranged marriages still exists in many countries.
许多国家仍然存在着包办婚姻的习俗。
* existence
n. 存在; 实有
It is impossible to prove the existence of God.
无法证明上帝的存在。
* coexistence
n. 共存，共处
the coexistence of two systems of measurement
两种计量制的共存
* coworker
n.同事，共同工作的人
* coeducation
n. 男女合校的教育（体制）
* cofounder
n. 联合创始人
* coauthor
n. 共同作者，合著者