unquivered
ˌʌŋˈkwɪvərd
Definitions
1. adjective
Not having or showing nerves; unflinching.
“The detective remained unquivered, even when faced with the gruesome crime scene.”
2. noun
A person who remains unflinching in the face of danger or adversity.
“The firefighter was a true unquivered, saving countless lives throughout his career.”