probity
definition
adherence to the highest principles and ideals of integrity and honesty
example
The lawyer's probity was unquestioned, as he always put his clients' best interests above his own gains.
synonyms
integritymoralityrectitude
word origin — late Middle English, from Old French 'probité', from Latin 'probitas', from 'probus' meaning 'honest' or 'noble'