13 letters · 17 points in Scrabble
originEtymology tree Proto-Indo-European *kʷetwóres Proto-Hellenic *kʷétwores Ancient Greek τέσσᾰρες (téssăres) Ancient Greek τετρᾰ- (tetră-)bor. English tetra- English fluor(ine) Proto-Indo-European *dʰeh₁-der. Proto-Italic *-iðos Latin -idusder. English -ide English fluoride English tetrafluoride From tetra- + fluoride.
Etymology from Wiktionary, CC BY-SA 3.0