עֵין תַּנִּיםʻÊyn Tannîym

(of water), Particular springs are

Pronunciation: ane tan-neem' · Hebrew/Aramaic (Old Testament) · H5886

Meanings

b. partridge-spring, id. (Judges 15:19)

d. dragon-spring (Nehemiah 2:13; Nehemiah 2:14; Nehemiah 3:15)

Same root

עַיִןʻayin · H5869an eye (literally or figuratively); by analogy, a fountain (as the eye of the landscape)
תַּןtan · H8565a monster (as preternaturally formed), i.e. a sea-serpent (or other huge marine animal); also a jackal (or other hideous land animal)

Source: Brown, Driver and Briggs, Hebrew and English Lexicon of the Old Testament (1906), public domain; markup by unfoldingWord, CC BY (github.com/unfoldingWord/Brown-Driver-Briggs-Enhanced).