疑難雜症

To doubt; to suspect; to hesitate; to be uncertain; to be perplexed; to fear; to seem like.

difficult; hard to do; problem; disaster; calamity; to scold; to blame

Mixed; miscellaneous; various; to mix; to mingle; to blend; complicated; not pure; not simple; non-essential.

disease; illness; symptom of a disease; (fig.) sticking point or problem