💡 Detailed Explanation
"難渋する" (nanjū suru) means to struggle and have difficulty with something that is not progressing smoothly. While "停滞" (teitai) means stagnation, "混迷" (konmei) means confusion, and "膠着" (kōchaku) means deadlock, "難渋" specifically describes a situation where one is struggling against difficulties while trying to move forward.