果你想別人一聽就能聽出你說的是姐姐。

其實英語裡的姐姐和妹妹都是用sister來表示的，就用eldersister，放到語境裡面再判斷說的是姐姐還是妹妹。妹妹用youngersister或者littlesister

姐姐 [jiě jie] sister; elder sister; [電影]Fury Or Love雙語例句

1他姐姐薩拉幫助了他。 His sister Sarah helped him. 《柯林斯高階英漢雙解學習詞典》 2我的姐姐給了我這本非常好看的書。 My sister"s given me this brilliant book. 《柯林斯高階英漢雙解學習詞典》 3現在她已經退休了，和姐姐一起住。 Now that she was retired she lived with her sister. 《柯林斯高階英漢雙解學習詞典》 4姐姐伊馮娜也來到奧克肯登小屋和我一起住了。 My sister Yvonne also came to live at Ockenden Cottage with me. 《柯林斯高階英漢雙解學習詞典》 5他姐姐說他故意給醫院留了假名字和假地址。 His sister said he had deliberately given the hospital a false name and address.