bǎo​quán

preserve

保全 bǎo​quán
preserve verb
to save from damage, preserve, or maintain in good condition

To protect the company's reputation, he chose to resign.

security guard noun
a person or professional service responsible for safety and security (Taiwan usage)

There are several security guards at the entrance of the building responsible for security checks.

Frequency

Movie subtitles
3.43 per million appears in 1% of films
Written text
4.42 per million

Sources

Definitions
CC-CEDICT