刻苦精励こっくせいれい Noun Irregular English jmdict 1 noun (common) (futsuumeishi) noun or participle which takes the aux. verb suru yojijukugo being arduous;working diligently enduring hardships;making a strenuous effort
精励せいれい Noun Irregular Intransitive English jmdict 1 noun (common) (futsuumeishi) noun or participle which takes the aux. verb suru intransitive verb diligence;industry;assiduity;hard work