one's appointed lot
宿命
one's arch [main] rival
一番の競争相手
one's aunt by marriage
妻[夫]のおば
one's behavior at meals
食事時の作法
one's beloved daughter
愛娘
one's better self
よい面,良心
one's biggest [largest, best] customer
上得意の客
one's bitter [old] rival
激しく張り合う[かつての]競争相手
one's bottom lip
下唇
one's bounden duty
義務,本分