英単語一覧に戻る
arduous
骨の折れる
同義語・関連語
hard, tough, difficult, demanding, challenging, strenuous, laborious, exhausting, taxing, draining, grueling, tiring ,
英単語一覧に戻る
hard, tough, difficult, demanding, challenging, strenuous, laborious, exhausting, taxing, draining, grueling, tiring ,