noun, noun which may take the genitive case particle 'no'
common to all humanity; shared by humanity
Used to describe things that belong to or are shared by all people, such as values, challenges, or heritage. Often appears in formal or written contexts.
環境問題は人類共通の課題だ。
Environmental issues are a challenge common to all humanity.
この遺跡は人類共通の遺産として保護されている。
These ruins are protected as a heritage shared by humanity.
Compound of 人類 (humanity) and 共通 (common/shared). The exact historical derivation is uncertain, but the meaning is transparent from its components.