“source / origin” in Japanese is 源, read gen, minamoto (げん, みなもと). It is a Grade 6 Kyōiku kanji, taught in year 6 of Japanese elementary school, and appears in words such as 源泉 (fountainhead).
What does 源 mean?
川の源をたずねる。
Same sound, different character — the classic trap. Compare them side by side: