a term of reproach derived from the Chaldee reka, worthless. ("Raca denotes a certain looseness of life and manners, while 'fool,' in the same passage, means a downright wicked and reprobate person.") (Matthew 5:22)
RACA
Meaning of RACA in English
Smith's Bible English dictionary. Английский библейский словарь Смита. 2012