9 letters · 11 points in Scrabble
originEtymology tree Proto-Indo-European *dʰregʰ-der.? Latin trahere Vulgar Latin *tragīnāre Old French traïnerder. Old French trainder. Middle English trayne English train Proto-Indo-European *-tḗr Proto-Indo-European *-dʰlom Proto-Indo-European *-dʰlis Proto-Italic *-ðlis Latin -bilis Latin -ābilis Old French -ablebor. Middle English -able English -able English trainable From train + -able.
Etymology from Wiktionary, CC BY-SA 3.0