extremely difficult or seemingly impossible to understand or interpret due to its unclear intent or cause
理解し難い, 不可解な
difficult to understand or obscure to most people due to its complexity
難解な, 難しい
designed to be so simple that even someone with little knowledge or skill can use it without making mistakes
馬鹿でも使える, 誰でも使える
extremely tiring, challenging, and demanding strenuous effort and perseverance
厳しい, 過酷な
intimidating, challenging, or overwhelming in a way that creates a sense of fear or unease
威圧的な, 挑戦的な
causing a significant loss of physical, emotional, or mental energy
疲れさせる, 消耗させる
achieving something after facing a lot of challenges and putting in a great deal of effort
苦労して得た, 努力して得た
causing fatigue, boredom, or irritation due to being repetitive or tiresome
疲れる, 退屈な
to use skill and cunning to gain an advantage over someone, defeating or surpassing them through intelligence
出し抜く, 凌駕する
to endure a difficult or dangerous situation with courage and determination
耐える, 立ち向かう