A.T. Robertson Commentary Acts 2:12

"And they were all amazed, and were perplexed, saying one to another, What meaneth this?" — Acts 2:12 (ASV)

Were perplexed (διηπορουντο). Imperfect middle of διαπορεω (δια, α privative, πορος) to be wholly at a loss. Old verb, but in N.T. only in Luke and Acts. They continued amazed (εξισταντο) and puzzled.

What meaneth this? (Τ θελε τουτο εινα). Literally, what does this wish to be?