13 letters · 24 points in Scrabble
adjective highly educated; having extensive information or understanding
adjective alert and fully informed
adjective thoroughly acquainted through study or experience; -W.H.Hudson; - Herbert Read
originEtymology tree English knowledge 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 knowledgeable From knowledge + -able.
Etymology from Wiktionary, CC BY-SA 3.0