Fountainhead

Noun

 * 1) a spring that is the source of a river
 * 2) an abundant source of knowledge, etc.

Thesaurus
font, fount, fountain, head, headspring, headstream, headwater, headwaters, inception, mainspring, mine, origin, provenance, provenience, quarry, riverhead, root, source, spring, springhead, well, wellhead, wellspring, whence

Translations

 * Finnish: alkulähde
 * Kurdish:
 * Sorani: سه‌رچاوه‌