11 letters · 16 points in Scrabble
adjective having or demonstrating ability to recognize or draw fine distinctions
adjective tending to penetrate; having the power of entering or piercing
originFrom Middle English penetratyve, penetratif, from Medieval Latin penetrativus, from (the participle stem of) Latin penetrāre (“to penetrate”).
Etymology from Wiktionary, CC BY-SA 3.0