I’m keeping on practicing the usage of the word “feeble”. So, may this sentence sound natural: “Living without enough sunlight makes me feel feeble”? How can be improved? 用 英語 (英國) 要怎麼說？

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Living without enough sunlight makes me feel sad/depressed.
Living without enough exercise/vitamins makes me feel feeble.
She gave him a feeble excuse for being late to dinner.
After my knee surgery, my walking is difficult and I'm feeble on my feet.