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wellspring

/ˈwɛlsprɪŋ/ noun

noun Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about wellspring at Wordnik → Where our words come from →

  1. The source of water for a stream, spring or well; a fountainhead; a wellhead.
  2. A perennial source of anything; a fountainhead of supply or emanation; resource.

Origin

From Middle English wellespring, from Old English wiellspring, wiellġespring (“spring, fount, fountain”), corresponding to well + spring. More at well, spring.

From Wiktionary, via Kaikki.org (CC BY-SA)