What word describes a deeply touching or emotionally impactful reminder?

The term that best describes a deeply touching or emotionally impactful reminder is "poignant." This word conveys a sense of emotional intensity and can evoke feelings of sadness, nostalgia, or compassion. It is often used in contexts where something stirs a strong emotional response, indicating that the reminder resonates with personal experiences or memories, creating a lasting impression on the individual.

The other words do not convey the same emotional depth. "Baleful" suggests a threatening or ominous quality, which does not align with the idea of a touching reminder. "Compunction" refers to a feeling of guilt or moral scruple that prevents or follows the doing of something bad, which is more about remorse than emotional impact. "Infirmity" denotes a physical weakness or illness, lacking any emotional connotation or connection to reminders. Hence, "poignant" is the most fitting choice for describing a reminder that deeply touches someone emotionally.