Which term describes 'a sudden feeling of mental distress'?

The term 'pang' specifically refers to a sharp, sudden feeling of emotional or mental distress, often associated with feelings like regret, sorrow, or longing. This word captures the intensity and immediacy of such feelings, illustrating a quick, piercing sensation that affects a person emotionally.

In contrast, 'ovation' commonly refers to enthusiastic public approval or praise, particularly in response to a performance, which doesn't align with the notion of mental distress. The word 'onslaught' typically describes a fierce or violent attack or an overwhelming outpouring, and while it conveys a sense of force, it lacks the personal emotional connection implied by 'pang.' Lastly, 'muster' generally means to gather or assemble and does not pertain to feelings of distress at all. Thus, 'pang' is the most accurate choice to describe a sudden feeling of mental discomfort.