What term describes a feeling of guilt-induced anxiety or uneasiness?

The term that describes a feeling of guilt-induced anxiety or uneasiness is "compunction." This word specifically captures the emotional state when someone feels remorse or guilt for having done something wrong, leading to a sense of unease. It is often associated with a moral or ethical consideration that unsettles an individual, prompting reflection on their actions and often a desire to make amends.

In contrast, the other terms have different meanings. "Infirmity" refers to a physical or mental weakness or disability, which does not relate to feelings of guilt or anxiety. "Diminutive" describes something very small in stature or size and is unrelated to emotional states. "Repast" refers to a meal, which does not convey any sense of guilt or anxiety either. Thus, "compunction" stands out as the most suitable term for the feeling described in the question.