10 letters · 22 points in Scrabble
adjective able to expand or be expanded
adjective (of gases) capable of expansion
originEtymology tree English expand 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 expandable From expand + -able.
Etymology from Wiktionary, CC BY-SA 3.0