11 letters · 13 points in Scrabble
noun an attack that penetrates into enemy territory
noun clear or deep perception of a situation
noun the act of entering into or through something
originFrom Middle English penetracioun, from Old French penetracïon, and its source, Latin penetrātiō, from the participle stem of penetrō (“pierce”, verb). Morphologically penetrate + -ion.
Etymology from Wiktionary, CC BY-SA 3.0