τρίβολος G5146
tríbolos · trib'-ol-os · Noun Masculine
from τρεῖς and βέλος; properly, a crow-foot (three-pronged obstruction in war), i.e. (by analogy) a thorny plant (caltrop):--brier, thistle.
2 Occurrences in the King James Bible
Matthew 7:16Ye shall know them by their fruits. Do men gather grapes of thorns, or figs of thistles?
Hebrews 6:8But that which beareth thorns and briers is rejected, and is nigh unto cursing; whose end is to be burned.