From an unused root meaning to sting; a prickly plant -- brier, thorn.
Englishman's Concordance
1) brier, thorn, prick 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: 611a
Brown-Driver-Briggs
חֵ֑דֶקnoun [masculine]brier (Late Hebrew id.; Aramaic חִדְקָא Löwp. 147, No. 104; compare Arabic a kind of night-shade, see Lane532); — טוֺבָם כַּחֵדֶקMicah 7:4the best of them (si vera lectio) is like the brier ("" יָשָׁר מִמְּסוּכָה); דֶּרֶךְ עָצֵל כִּמְשֻׂכַת חָ֑דֶקProverbs 15:19the way of a sluggard is like a brier-hedge.
Proverbs 15:19 HEB:עָ֭צֵל כִּמְשֻׂ֣כַת חָ֑דֶק וְאֹ֖רַח יְשָׁרִ֣ים NAS: is as a hedge of thorns, But the path KJV: [man is] as an hedge of thorns: but the way INT: of the lazy A hedge of thorns the path of the upright
Micah 7:4 HEB: טוֹבָ֣ם כְּחֵ֔דֶק יָשָׁ֖ר מִמְּסוּכָ֑ה NAS: The best of them is like a briar, The most upright KJV: The best of them [is] as a brier: the most upright INT: the best A briar upright A thorn