This word occurs frequently, and is the translation of several different terms.
Micah 7:4, it denotes a species of thorn shrub used for hedges. In Proverbs 15:19 the word is rendered "thorn" (Heb.
Hedek , "stinging"), supposed by some to be what is called the "apple of Sodom" (q.v.).
Sallon' , properly a "prickle," such as is found on the shoots of the palm tree.
Isaiah 55:13, probably simply a thorny bush. Some, following the Vulgate Version, regard it as the "nettle."
Isaiah 5:6; 7:23-25, etc., frequently used to denote thorny shrubs in general. In 10:17; 27:4, it means troublesome men.
In Hebrews 6:8 the Greek word (tribolos) so rendered means "three-pronged," and denotes the land caltrop, a low throny shrub resembling in its spikes the military "crow-foot." Compare Matthew 7:16, "thistle."
These dictionary topics are from M.G. Easton M.A., D.D., Illustrated Bible Dictionary, Third Edition, published by Thomas Nelson, 1897. Public Domain, copy freely.
Easton, Matthew George. "Entry for 'Brier'". "Easton's Bible Dictionary".