G3148 μάστιξ (mástix)

KJV renderings: plague, scourging
Strong's definition: a whip (literally, the Roman flagellum for criminals; figuratively, a disease)
Derivation: probably from the base of G3145 (μασσάομαι) (through the idea of contact);

From James Strong's public-domain dictionaries (G), JSON edition by OpenScriptures (CC-BY-SA). Every dotted-underline word in the text links here.