苦疾
[kŭ jí]
'Bitter Ailment' directly points to pain, suffering and illness; it shows a pessimistic state or mindset. Users may use this type of net names when they are facing health issues physically and mentally or going through tough times. It could signify the difficulties of coping with diseases or adversities, as well as reflecting a rather helpless, negative view on one’s current state and circumstances in life.