11 letters · 18 points in Scrabble
verb be a mystery or bewildering to
verb cause to be confused emotionally
originFrom bewilder (“to confuse, disorientate, or puzzle someone, especially with many different choices”) + -ing (suffix forming nouns or noun-like words from verbs, denoting the act of doing something, an action, or the embodiment of an action; and forming the present participles of verbs).
Etymology from Wiktionary, CC BY-SA 3.0