ancestor

/ˈænˌsɛstər/

someone from whom you are descended (but usually more remote than a grandparent)

中文释义：祖先；祖宗

Many people trace their ancestors through genealogical research.

许多人通过家谱研究追溯他们的祖先。

Modern humans share a common ancestor with chimpanzees.

现代人类与黑猩猩有共同的祖先。