This is the 683rd most frequent Chinese word.
主持
To host or preside.
Here, '主持' is used as a verb to mean 'to host or preside over' an event or gathering.
今天的会议由张老师主持。
Today's meeting is hosted by Teacher Zhang.
In this sentence, '主持' is used as a noun indicating 'the act of hosting or anchoring', specifically referring to TV programs or shows.
他对这个栏目播视的主持很出色。
His anchoring of this TV program is excellent.
Here, '主持人' uses '主持' as part of a compound noun, meaning 'chairperson or host' of an event or organization.