thou worthless

usually taken to represent the Aram. , a shortened form of , "empty," as vocalized in the Galilæan dialect; an expression of contempt, : (cf. , iv, 191 f.; and for other explanations, v. Zorell, s.v.).† רֵיקָא רֵיקָן raca Mt 5:22 DB

O empty one, i.e. thou worthless (as a term of utter vilification)

Raca