An archer is someone who shoots arrows from a bow. In the past that was often a soldier’s work; today it is usually a sport, a hobby, or a figure in a story — Robin Hood is the archer many English classes meet first.

an archerarcher（弓箭手） is someone who shoots arrows from a bow是用弓射箭的人。in the past在過去，that was often a soldier's work這常常是軍人的工作；today it is usually a sport, a hobby, or a figure in a story今天它通常是一種運動、一種嗜好、或是故事裡的一個角色——Robin Hood is the archer many English classes meet first羅賓漢就是很多英文課最先認識的那個弓箭手。

The word names the person, not the sport (that is archery) and not the weapon. You can be an archer in a club, in a film, or in history, without being in the Olympics.

the word names the person這個字指的是人，not the sport (that is archery)不是那項運動（運動叫 archery），and not the weapon也不是那個武器。you can be an archer in a club, in a film, or in history你可以在社團裡、在電影裡、或在歷史上是一個 archer，without being in the Olympics不一定要參加奧運。

It is a plain, old word; it is not slang and not especially formal.

it is a plain, old word這是一個平實的老字；it is not slang and not especially formal不是俚語，也不特別正式。

Though actually the letters arch- here are not the “chief” prefix you see in archbishop or archenemy. This one comes from the Latin word for a bow.

though actually不過其實，the letters arch- here are not the "chief" prefix you see in archbishop or archenemy這裡的 arch- 不是 archbishop 或 archenemy 裡那個表示「首要」的字首。this one comes from the Latin word for a bow這個 arch- 是來自拉丁文裡「弓」這個字。