Common Meanings
1
qī期
A fixed or specified period of time; a term.
这个学期我选修了一门新课程。
This semester I took a new elective course.
A measure word for issues of periodicals, magazines, or other serialized items, indicating a specific installment or period.
我喜欢看这本杂志，尤其是它关于旅行的专题，每一期都很精彩。
I enjoy reading this magazine, especially its travel features; every issue is wonderful.
To expect; to hope for; to look forward to.
我们期待着这次旅行。
We are looking forward to this trip.
Refers to a set limit or a fixed period. When paired with '无' (wú), meaning 'without', it indicates an indefinite term or no deadline.
这项服务是无期的,只要你需要就可以一直使用。
This service is indefinite; you can continue to use it for as long as you need.
To be determined to; to resolve to; to firmly expect.
他期以成功，付出了所有的努力
He was determined to succeed and put in all his effort.
Qīyí (期颐) refers to the age of one hundred.
祝愿奶奶期颐之年，身体依然康健
Wishing Grandma good health even at one hundred years old.
In geology, a time unit smaller than an epoch, referring to a specific period within a country or large region.
这个区域的岩石记录了多个地质期。
The rocks in this area record multiple geological periods.
2
jī期
Refers to a full period of time, specifically a full year or a full month. Examples include '期年' (a full year), '期月' (a full month), and '期服' (an ancient mourning dress worn for a full year).
按照古礼，他应为父母守丧期年
According to ancient rites, he should observe mourning for his parents for a full year.