geo
地理の
覚え方のコツ Memory Tip
geo は geography の略として「地理」を指すほか、geo- の形で「地球・大地」を表す語形成要素です。geography「地理学」、geology「地質学」、geothermal「地熱の」に共通する部分として覚えます。単独の geo はくだけた略語なので、正式な文章では geography を使うのが安全です。
Connect geo with geography and with the earth itself. As an informal noun, geo can be a short form of geography, especially in casual speech or labels, though geography is safer in formal writing. As the combining form geo-, it appears in words such as geology, geothermal, and geolocation. Use the second part to unlock the full meaning: -graphy concerns description, -logy concerns study, and thermal concerns heat. Thus, geo helps signal that the word involves the earth, land, or a place on the earth.
geo の類義語・関連語
geo の語源・成り立ち Etymology
ギリシャ語gē（大地・地球）に由来する接頭辞。geography（地理学＝地球を描く）やgeology（地質学＝地球の学問）など多くの学術用語の基盤。gē+graphein（書く）→地球を記述する学問、という構造を知ると、geo-がつく単語の意味が推測しやすくなる。
Geo and the combining form geo- ultimately come from Greek gē, meaning “earth” or “land.” Greek-based learned formations include geography, combining the idea of earth with writing or description, and geology, combining earth with study. In modern informal English, geo may also function independently as an abbreviation of geography, while geo- remains productive in terms involving the earth or location.
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