From kenteo (to prick); a point ("centre"), i.e. A sting (figuratively, poison) or goad (figuratively, divine impulse) -- prick, sting.
1. a sting, as that of bees (4 Macc. 14:19), scorpions, locusts, Revelation 9:10. Since animals wound by their sting and even cause death, Paul in 1 Corinthians 15:55 (after Hosea 13:14, the Sept.) attributes to death, personified, a κέντρον, i. e. a deadly weapon, and that κέντρον is said to be ἡ ἁμαρτία (56), because sin is death's cause and punishment (?) (Romans 5:12).
2. as in the Greek writings an iron goad, for urging on oxen, horses and other beasts of burden; hence, the proverb πρός κέντρα λακτίζειν, to kick against the goad, i. e. to offer vain and perilous or ruinous resistance: Acts 9:5 Rec.;