Firmly committed or steadfast.

दृढ़

English Usage: He has a staunch belief in justice.

Hindi Usage: उसे न्याय में एक दृढ़ विश्वास है।

A person who is loyal and committed.

वफादार व्यक्ति

English Usage: She is a staunch supporter of environmental causes.

Hindi Usage: वह पर्यावरणीय कारणों की एक वफादार समर्थक है।

To stop the flow of something (typically blood).

बहाव को रोकना

English Usage: The doctor tried to staunch the bleeding.

Hindi Usage: डॉक्टर ने रक्तस्राव को रोकने की कोशिश की।