切磋 せっさ琢磨 たくま
sessatakuma

Noun
Suru Verb

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

Intransitive
Yojijukugo
きみ実力 じつりょくなら楽勝 らくしょうだとは おもうが、それに おごらず、まずはクラスのみんなと切磋 せっさ琢磨 たくましていって しい。
kimino jitsuryokunara rakushōdatowa omōga soreni ogorazu mazuwa kurasuno minnato sessatakuma shite ittehoshii.
I think you could easily win with your ability, but I want you to not be arrogant about it and work hard with everyone in your class first.
Noun
Suru Verb

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

Intransitive
Yojijukugo
Other forms: