Do you know that the origins of the words “river”, “rival”, and “arrive” are common?
岩田一男『英単語記憶術』(ちくま文庫、2014年、初版は1967年の光文社カッパブックス)参照。
Rivals are people who live on each side of a river.
Arrival used to mean arriving at the bank of a river.
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Interesting! I love discovering the history behind words and phrases. Thanks!