Tom is very embittered.

That guy's very embittered.

Tom was an embittered old man who was weary of life.

The sweetness of her voice, the delicacy of her expressions, the vivid glow of her filial affection, embittered his regret at having repulsed her gratitude with rudeness.

The sweetness of her voice, the delicacy of her expressions, the vivid glow of her filial affection, embittered his regret at having repulsed her gratitude with rudeness, while, at the same time, they placed before his imagination a picture of the most seducing sweetness.