困難

(1)hard to endure; "fell upon trying times"

(2)持ちこたえるのが難しい

(3)not easy; requiring great physical or mental effort to accomplish or comprehend or endure; "a difficult task"; "nesting places on the cliffs are difficult of access"; "difficult times"; "why is it so hard for you to keep a secret?"

(4)簡単でない

(5)完成させ、理解しまたは我慢する物理的または精神的努力を必要とする

(6)making great mental demands; hard to comprehend or solve or believe; "a baffling problem"; "I faced the knotty problem of what to have for breakfast"; "a problematic situation at home"

(7)大きな精神的な要求を行うさま

(8)理解する、解決する、あるいは信じることが難しい

(9)characterized by effort to the point of exhaustion; especially physical effort; "worked their arduous way up the mining valley"; "a grueling campaign"; "hard labor"; "heavy work"; "heavy going"; "spent many laborious hours on the project"; "set a punishing pace"

(10)消耗といっていいほどの努力によって特徴づけられる

(11)特に身体的な努力

(12)characterized by or indicative of distress or affliction or danger or need; "troubled areas"; "fell into a troubled sleep"; "a troubled expression"; "troubled teenagers"

(13)苦悩、苦痛、危険あるいは必要性により特徴付けられるあるいはそれらを示す

(14)very difficult; severely testing stamina or resolution; "a rugged competitive examination"; "the rugged conditions of frontier life"; "the competition was tough"; "it's a tough life"; "it was a tough job"

(15)非常に難しい

(16)非常に厳しい気力と決意

(17)requiring or showing effort; "heavy breathing"; "the subject made for labored reading"

(18)努力を要求または見せる

(1)