Translation Japanese English: 艱険
Dictionary: main艱険形容詞3 arduous,
backbreaking,
grueling,
gruelling,
hard,
heavy,
laborious,
operose,
punishing,
straining,
strenuous,
toilsome.
4 arduous,
extreme,
extremist,
fierce,
radical,
straining,
strenuous,
tearing,
trigger-happy,
ultra,
utmost,
uttermost,
vehement,
violent.