活动
活动 (huódòng) means "activity" or "event" and is a versatile word used for organized events, physical activities, or campaigns. It appears in many contexts from 体育活动 (sports activities) to 庆祝活动 (celebration events). It can also function as a verb meaning "to move around."
学校这周组织了很多课外活动。
xuéxiào zhè zhōu zǔzhī le hěn duō kèwài huódòng.
The school organized many extracurricular activities this week.
你想参加这个周末的志愿者活动吗?
nǐ xiǎng cānjiā zhège zhōumò de zhìyuànzhě huódòng ma?
Would you like to join the volunteer activity this weekend?
这次庆祝活动吸引了上千人参加。
zhè cì qìngzhù huódòng xīyǐn le shàng qiān rén cānjiā.
This celebration attracted over a thousand people to participate.