General Usage:
* The king's unfaithful advisor betrayed him and plotted his downfall.
* The rumors of her unfaithful husband were finally confirmed.
* He was a unfaithful friend who always let people down.
Figurative Usage:
* The unfaithful reproduction of the painting lacked detail and accuracy.
* The weather forecast proved unfaithful as the sun broke through the clouds.
In Relationship Context:
* The woman felt betrayed by her husband's unfaithful behavior.
* The unfaithful lover was caught in the act and exposed to everyone.
* He swore he would never be unfaithful again, but his actions spoke louder than words.
In a Religious Context:
* Many people believe that unfaithful actions are punished by God.
* The scriptures teach that unfaithfulness is a sin.
Adding Nuance:
* He felt deeply unfaithful to his wife and family.
* The unfaithful lover was a master of deception.
* The unfaithful witness lied under oath and cost the defendant their freedom.
Remember to choose the sentence that best suits the context you're writing for.