1. diligent application (to work or study), cultivating one's character by studying hard

noun or participle which takes the aux. verb suru noun (common) (futsuumeishi) intransitive verb yojijukugo

2. mutual encouragement (to improve), working hard together, friendly rivalry

intransitive verb noun or participle which takes the aux. verb suru noun (common) (futsuumeishi) yojijukugo