the.com/code of honor

means An unwritten personal rulebook of integrity and conduct that you hold yourself to, especially when no one is watching to enforce it.

from 'Code' traces back to Latin codex, originally a block of wood split into wax-covered writing tablets, later a bound book of laws — the Roman legal codes gave us the sense of 'a systematic set of rules.' 'Honor' comes from Latin honor/honos, meaning esteem, dignity, or official rank. The phrase itself crystallized in the language of chivalry and dueling culture, where warriors and gentlemen were expected to live by unwritten laws of conduct — loyalty, courage, fair play — enforced not by courts but by reputation and conscience.