noun, noun which may take the genitive case particle 'no'
same origin; common origin
Used to describe things that share a historical or etymological source, such as words, species, or cultural practices. Often appears in academic or technical contexts.
これらの単語は同源であると考えられている。
These words are thought to have the same origin.
同源の文化が各地に広がった。
Cultures of common origin spread to various regions.
Compound of 同 (same) and 源 (source, origin). The variant 同原 uses 原 (original) with a similar meaning. The exact historical derivation is straightforward from the kanji components.