youngest / most junior / tiny / one (unambiguous spoken form when spelling out numbers, esp. on telephone or in military) / one or ace on dice or dominoes / variant of 吆[yao1], to shout
The first concern is affairs of state, enjoying the pleasure comes later. Quotation from essay On Yueyang Tower 岳陽樓記|岳阳楼记 by Song writer Fan Zhongyan 范仲淹[Fan4 Zhong4 yan1]
to be born with a weak constitution and suffer from ill health during one's life / (fig.) to be problematic from the start, and get even worse over time