strenuous

详细解释:a. 奋发的, 费劲的, 艰苦的
相关词组:
make strenuous efforts

词型变化：

副词:strenuously名词:strenuosity

英语解释：

形容词 strenuous:

characterized by or performed with much energy or forcetaxing to the utmost; testing powers of endurance- F.D.Roosevelt同义词：arduous, straining