hard-bitten
adjective uk/ˌhɑːdˈbɪt.ən/ us/ˌhɑːrdˈbɪt̬.ən/
（某人）经过磨炼的，坚毅的
If someone is hard-bitten, their character has been made stronger as a result of difficult experiences in the past.
This particular murder case was so horrific that it shocked even the most hard-bitten of New York police officers. 这起特别的谋杀案是如此可怕，就连纽约最老练的警官都为之震惊。
Synonyms: hard-boiledpugnacious