be not fond of childish pranks,though young; be not fond of play when one is young ? 夷吾～，能斗不過(guò)，…… (《左傳·僖九年》)When Yiwu was young,he was not fond of play; he could fight,but in moderation.
弱不好弄ruò bù hào nònɡ
弱：年少；弄：戲弄、玩耍。年少時(shí)不喜歡玩耍。dislike childish pranks, though young