11 letters · 20 points in Scrabble
originPIE word *h₂ékʷeh₂ Learned borrowing from Late Latin terraqueus + English -ous (suffix denoting the presence of a quality in any degree, usually an abundance). Terraqueus is derived from Latin terra (“dry land; earth, soil”) (ultimately from Proto-Indo-European *ters- (“dry”)) + Late Latin aqueus (“aqueous; watery”) (from Latin aqua (“water”) (ultimately from Proto-Indo-European *h₂ékʷeh₂…
Etymology from Wiktionary, CC BY-SA 3.0