principled
adjective /ˈprɪnsəpld/
  /ˈprɪnsəpld/
 - having strong beliefs about what is right and wrong; based on strong beliefs
- a principled woman
 - to take a principled stand against abortion
 
Extra ExamplesTopics Personal qualitiesc1- Their approach might seem principled, but in fact it's morally dubious.
 - We need to get back to the days of principled journalism.
 
 - based on rules or truths
- a principled approach to language teaching