for why

for why (not comparable)

1. (obsolete except non-native speakers' English) For what reason; why.
   • 2017, Velvel Pasternak, Behind the Music, Stories, Anecdotes, Articles and Reflections, page 62:

     As she tied the boxes, her curiosity could no longer be contained. "Mister," she said, "for why do you need such hats?"

• whyfor