She tired easily and had a weak heart.

她容易疲劳，心脏也比较弱。

《柯林斯英汉双解大词典》

Back at our hostel, I am feeling tired and weak and put it down to the heat and the steep climb with ridiculously heavy and over-packed backpack.

回到旅馆里，我感觉疲惫衰弱，大概是天气炎热，爬了陡坡的关系，再加上我装得太满，重得不可思议的双肩包。

youdao

Right from the first verse, the lyrics of this song can totally be related to running: "' Cause sometimes you feel tired, feel weak, and when you feel weak, you feel like you wanna just give up."

从第一个，歌词完全地跟跑步有关：“因为有时你感到疲倦，感到虚弱，当你感到虚弱时，你感觉你想要放弃。”

youdao

On and on they marched. Many of them -- weak from hunger and tired beyond belief could go no farther.

VOA: special.2009.12.17

He told a friend that he felt very tired and weak.

VOA: special.2009.03.19

But that day she was tired and a little bit weak.

VOA: special.2009.09.05

"I called it the Statue of Liberty: give us your tired, your weak, your poor, " Cashman said.

WSJ: New York Yankees: Down but Not Out��Brian Cashman