What does the verb 'Ail' refer to?

The verb 'ail' specifically refers to a state of being troubled or afflicted, whether physically or mentally. When we use 'ail' in a sentence, it typically describes someone who is suffering from an illness or emotional distress, emphasizing the impact on their well-being. For example, one might say they are ailing if they are experiencing chronic pain or emotional turmoil.

The other options represent different actions or states that do not align with the definition of 'ail.' Engaging in cheerful social interactions does not capture the essence of being troubled; formally accusing someone relates to criminal justice and does not connect to affliction; and relying on someone indicates dependence rather than a state of suffering. Thus, 'C' is the most accurate representation of the meaning of 'ail.'