ancestor
英検2級・TOEFL・大学受験祖先、祖先。進化・歴史で、祖先（⇔descendant）
意味
- (一人の)先祖,祖先(forefather)
- (事物の)原型,先駆
- (生物の)原型種
例文
The industrious merchant worships his ancestors.
その勤勉な商人は自分の祖先を崇拝しています。
We visit the tombs of our ancestors on this day.
この日私たちは先祖の墓参りをする。
Our ancestors came to this country 150 years ago.
私たちの祖先はこの国に１５０年前にやってきた。
語源
英語の原文（Wiktionary）
From Middle English ancestre, auncestre, ancessour; the first forms from Old French ancestre (modern French ancêtre), from the Latin nominative antecessor (“one who goes before”); the last form from Old French ancessor, from Latin antecessōrem, accusative of antecessor, from antecēdō (“to go before”) + -tor (“-er”), from ante- (“before”) + cēdō (“to go”). See cede, and compare with antecessor.