What does 具 mean?
具 is a Japanese noun meaning “tool; means” in English. It can also be translated as “ingredients (added to soup, rice, etc.), counter for sets of armor, utensils, furniture, etc.” depending on context. It is written as 具 in kanji, ぐ in hiragana, and gu in romaji. This word is part of JLPT N3 vocabulary.
Example sentence
ぎょうざの具のあまりは？餃子を家で作りましたが、皮が少なかったせいか、具が少し余ってしまいました。
Gyoza stuffing? I made some gyoza at home but, possibly because I didn't have enough dough, I had some of the filling left over.