Lexical Definition

‎μάστιξ‎ mástix (mas'-tix) whip ^G:N-F
probably from the base of ‎μασσάομαι‎ (through the idea of contact)

plague, scourging.

• a whip (literally, the Roman flagellum for criminals
• figuratively, a disease)

Abbott-Smith

μάστιξ, -ιγος, ἡ, [in LXX for שׁוֹט, etc.;]
a whip, scourge: Ac 22:24, He 11:36; metaph., of disease or suffering as a divine chastisement (cf. Ps 88 (89):33, Pr 3:12, II Mac 9:11), Mk 3:10 5:29, 34, Lk 7:21.†

Abbott-Smith References

Liddell-Scott-Jones

μάστιξ-ιξ, ῑγος, ἡ,

whip, scourge, mostly for driving horses, [Refs 8th c.BC+]; ἵππου μ. horse-whip, [Refs 5th c.BC+]; λιγυρὰ μ. διπλῆ [Refs 5th c.BC+]; later, scourge, ὑπὸ μαστίγων διαβαίνειν to cross under the lash, of soldiers flogged on, [Refs 5th c.BC+]; μάστιξιγ᾽ ἔχων whip in hand, [Refs 5th c.BC+]

__II metaphorically, scourge, plague, μάστιξιξ Διός [μάστιξιγι θείᾳ.. ἐλαύνομαι 4th-5th c.BC: Aeschylus Tragicus “Prometheus Vinctus” 682; πληγεὶς θεοῦ μάστιξιγι [prev. author] “Th.” 608 ">Refs 8th c.BC+]; διπλῇ μ., τὴν Ἄρης φιλεῖ, i.e. fire and sword, [Refs]; μ. [Θεοῦ], of sickness, [NT]; but μάστιξιξ Πειθοῦς the lash of eloquence, [Refs 5th c.BC+] — _Ionic dialect_ μάστιξις (which see): μάστιξιγξ is not found.

_{LSJ Scripture Refs: Mark.5.34}