n.不忠实
His disloyalty stabbed me to the heart. 他对我不忠使我伤透了心。
He was/felt deeply wounded by their disloyalty. 因为他们不忠,他十分伤心。
I know he suspect me of disloyalty, but I suppose I'll just have to brave it out. 我知道他怀疑我不忠,但是我想我不得不硬着头皮去见他。