Dictionary entry

ἐκτινάσσω

G. Abbott-Smith's A Manual Greek Lexicon of the New Testament

ἐκ-τινάσσω

[in LXX for נָעַר ni., pi., etc.;]

to shake off: κονιορτόν, Mt 10:14; χοῦν, Mk 6:11. Mid.: κονιορτόν, Ac 13:51; ἱμάτια, Ac 18:6 (cf. MM, Exp., iii).†