This is the 887th most frequent Japanese word.
共同
"Joint; cooperation; collaboration."
共同 means 'collaboratively' here, indicating joint effort between people towards a shared goal.
私たちはプロジェクトを共同で進めています。
We are advancing the project collaboratively.
共同 is used to mean 'jointly', referring to shared ownership of the building by multiple parties.
このビルは共同で所有されています。
This building is jointly owned.
共同 signifies 'jointly' here, emphasizing cooperation in conducting research activities.