#1621 ἐκτινάσσω ektinasso {ek-tin-as'-so}

 from G1537 and tinasso (to swing); TDNT - n/a; v

—Greek Word Study (Transliteration-Pronunciation Etymology & Grammar)

 1) to shake off so that something adhering shall fall
    1a) by this symbolic act a person, expresses extreme contempt for
        another and refuses to have any further dealings with him
    1b) to shake off for (the cleansing of) one's self

—Thayer's (New Testament Greek-English Lexicon)

—Strong's (Greek Dictionary of the New Testament)

—NAS Exhaustive Concordance of the Bible with Hebrew-Aramaic and Greek Dictionaries

 AV - shake off 3, shake 1; 4

—Exhaustive Concordance (KJV Translation Frequency & Location)