せいじつ誠実seijitsu
1.

The quality of being genuine and without deceit, characterized by actions that align with a strong sense of morality and honesty in all situations.

2.

A state of mind where one expresses true feelings and intentions, demonstrating reliability and a deep sense of integrity in relationships and interactions.

3.

The attribute of being earnest and straightforward, often exhibiting a commitment to truthfulness and a profound sense of responsibility to others.

4.

The condition of having a heartfelt sincerity that is free from duplicity, reflecting a commitment to authenticity and trustworthy behavior.

Example:

ナンシーには誠実さが欠けているようだ。

ふせいじつ不誠実fuseijitsu
1.

The quality of not being genuine in one’s intentions, often characterized by deception or a lack of integrity in one's actions or words.

2.

A state or behavior in which one fails to act in a straightforward or truthful manner, leading to a relationship of mistrust or betrayal.

3.

An attitude or conduct that reflects a disconnection from honesty, often resulting in misleading others or failing to uphold commitments.

Example:

彼女は私を不誠実だと非難した。