דָּהַם

From LSJ

τὸ ὅλον τόδε ποσαπλάσιον τοῦδε γίγνεται → how many times greater is this whole sum than that one

Source

English (Strong)

a primitive root (compare דּ֫וּחַ); to be dumb, i.e. (figuratively) dumbfounded: astonished.