如何理解这个词 your majesty?为什么不直接叫majesty?

Your Majesty 陛下
his(her,your)majesty 陛下;
We address the King as "Your Majesty".
我们对国王称呼「陛下」.
Do you play croquet?Yes.Your Majesty.
你们玩槌球吗?是的,王后陛下.
"Right here,Your Majesty,you see?" Nasreddin pointed to the well.
“陛下,就在这里,你看到了吧?”纳斯雷丁指着井说.
Your Majesty,I have to ask for a favor.
皇上,小人有一事想请皇上帮忙.
Unleashed merely a day away.Your Majesty.
离我们只有数天的距离.女王陛下.
习惯就好了,我已经习惯了.