Raca - Vine's Expository Dictionary of New Testament Words
Raca[ 1,,G4469, raka ]
is an Aramaic word akin to the Heb. req, empty," the first "a" being due to a Galilean change. In the AV of 1611 it was spelled racha; in the edition of 1638, raca. It was a word of utter contempt, signifying "empty," intellectually rather than morally, "empty-headed," like Abimelech's hirelings, Judges 9:4, and the "vain" man of James 2:20. As condemned by Christ, Matthew 5:22, it was worse than being angry, inasmuch as an outrageous utterance is worse than a feeling unexpressed or somewhat controlled in expression; it does not indicate such a loss of self-control as the word rendered "fool," a godless, moral reprobate.