He is a friend that succour one fallen in distress and is undergoing affliction; and he acts friendly that helped a person lapsing from the path of morality.
स सुहृद्यो विपन्नाथ दीनमभ्युपपद्यते। स बन्धुर्योऽपनीतेषु साहाय्यायोपकल्पते॥