Strong's #5621: carab (pronounced saw-rawb')
from an unused root meaning to sting; a thistle:--brier.
Brown-Driver-Briggs Hebrew Lexicon:
sârâb
1) brier, rebel
1a) meaning dubious
Part of Speech: noun masculine
Relation: from an unused root meaning to sting
Usage:
This word is used 1 times:
Ezekiel 2:6: "them, neither be afraid of their words, though briers and thorns be with"