dishonesty
deceit / fraud / mendacity / untrustworthiness
Noun
This term carries a strong moral condemnation, focusing on the breach of trust and the violation of ethical standards. It describes a state of being deceptive, whether through active lying or the omission of truth, often implying a character flaw rather than a one-time mistake. As an uncountable noun, it refers to the general concept of deceit. However, it can function as a countable noun when referring to a specific act or instance of fraud, such as a particular case of financial dishonesty.