困難

(1) 持ちこたえるのが難しい(hard to endure; "fell upon trying times")(hard to endure)

⇒困難な時期を経験した(hard to endure)

(2) 簡単でない完成させ、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(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?")(not easy)(requiring great physical or mental effort to accomplish or comprehend or endure)

⇒なぜ秘密を守るのがそんなに難しいのか？(requiring great physical or mental effort to accomplish or comprehend or endure)

(3) 大きな精神的な要求を行うさま理解する、解決する、あるいは信じることが難しい(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")(making great mental demands)(hard to comprehend or solve or believe)

⇒家庭の問題の多い状況(hard to comprehend or solve or believe)

(4) 消耗といっていいほどの努力によって特徴づけられる特に身体的な努力(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")(characterized by effort to the point of exhaustion)(especially physical effort)

⇒とても疲れる速度を設定する(especially physical effort)

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

⇒問題を抱えたティーンエイジャー(characterized by or indicative of distress or affliction or danger or need)

(6) 非常に難しい非常に厳しい気力と決意(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")(very difficult)(severely testing stamina or resolution)

⇒それはきつい仕事だった(severely testing stamina or resolution)

(7) 努力を要求または見せる(requiring or showing effort; "heavy breathing"; "the subject made for labored reading")(requiring or showing effort)

⇒大変な読解でなされる主題(requiring or showing effort)