raceという単語は、「競争」という意味しか知らなかった私には驚きでした。 ---- race A race is one of the major groups which human beings can be divided into according to their physical features, such as the colour of their skin. ----
tribe Tribe is sometimes used to refer to a group of people of the same race, language, and customs, especially in a developing country. Some people disapprove of this use.
clan A clan is a group which consists of families that are related to each other.
troop Troops are soldiers, especially when they are in a large organized group doing a particular task. <=軍隊用語 A troop of people or animals is a group of them.