This is the 2473rd most frequent Japanese word.
保守
"Conservatism" or "maintenance."
Here, '保守' is used to indicate the maintenance and servicing of equipment or machines.
その機械の保守が毎月行われています。
The maintenance of that machine is conducted monthly.
In this sentence, '保守' is part of the adjective '保守的', which means 'conservative', referring to ideas or attitudes favoring traditional norms or practices.
彼の意見は保守的すぎると感じました。
I felt that his opinion was too conservative.
This example uses '保守' in a business context to refer to maintenance agreements or plans for systematic maintenance.