A person who designs, builds, or operates fountains; someone skilled in fountain engineering or ornamentation.
From fountain + -eer suffix (from French -ier) meaning a person who practices or specializes in something. This is a rare, specialized term for fountain craftspeople.
The -eer suffix (like in 'engineer' and 'auctioneer') often marks specialized tradespeople, so a fountaineer was a luxury expert—only wealthy nobles and cities could afford to hire them!
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