Learn how to say Ancestors correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word ancestor:
a person, typically one more remote than a grandparent, from whom one is descended:
he could trace his ancestors back to James the First
an early type of animal or plant from which others have evolved:
the ancestor of most dolphins is not clear
both species of elephant have a common ancestor
an early version of a machine, system, etc.:
this instrument is an ancestor of the lute
Middle English: from Old French ancestre, from Latin antecessor, from antecedere, from ante ‘before’ + cedere ‘go’
Remember that the ending of ancestor is -or.