From an unused root meaning to sting; a thistle -- brier.
Englishman's Concordance
1) brier, rebel 1a) meaning dubious Part of Speech: noun masculine A Related Word by BDB/Strong’s Number: from an unused root meaning to sting Same Word by TWOT Number: 1542
Brown-Driver-Briggs
[סָרָב] noun masculinerebel ? according to Thes and others (probably Aramaic loan-word, compare Aramaic contradict, chatter, prattle, tell lies; Pa`el סְרַב and Late Hebrew Pi`el סֵרֵב=Biblical Hebrew; compare סרב Ecclus 41:2d loving contradiction); — plural absolute (i.e. אִתָּךְ) סָרָבִים וְסַלּוֺנִים אוֺתָ֑ךְEzekiel 2:6rebelles et quasi spinae sunt erga te Thes; Vrss read participle, Co Berthol סֹרְבִים וְסֹלִיםresisting and despising thee (compare סַלּוֺן); AV RV briers and thorns compare Ew Hi-Sm SiegfKau Da Toy.
Ezekiel 2:6 HEB:תִּירָ֗א כִּ֣י סָרָבִ֤ים וְסַלּוֹנִים֙ אוֹתָ֔ךְ NAS: though thistles and thorns KJV: of their words, though briers and thorns INT: fear though thistles and thorns for