This noun has two meanings. One can refer to a part of our body, and the other can refer to a kind of vegetables.

回復 @Omar：Good guess but wrong. You cannot find any body part from the spelling of this word.

回復 @圓環之理：I looked up dictionary and found "I got beaned", which means "My head was hit". Maybe you said that. However, that's not the word I think.

回復 @圓環之理：Welp... when related to part of our body, it will conbine with "bone" to refer to something in bones.

回復 @圓環之理：this word has 6 letters.

回復 @圓環之理：green

回復 @淺風仁櫻：If this question is so difficult that there is no correct answer until December 5, I'll reveal it.

回復 @三葉草：in a long and round form.

The answer is marrow

1.a soft substance that fills the hollow parts of bones

2.a large, long vegetable that grows on the ground. Marrows have dark green skin and are white inside.