Probably feminine of gopher; properly, cypress- resin; by analogy, sulphur (as equally inflammable) -- brimstone.
see HEBREW gopher
H1614. gophrith
גָּפְרִית noun feminine brimstone (Aramaic גּוּפְרִיתָא, also כובריתא כבריתא,, , ; Arabic (certainly foreign word); derived from (כֹּפֶר), גֹּפֶר by Thes Rob-Ges, compare Di Genesis 6:14; i.e. pitch, and then other combustibles, especially sulphur; Lagl.c. thinks from Bactrian vohûkereti) — גָּפְרִית 19:24 6t. — brimstone, after הִמְטִיר 19:24 (J), figurative of judgment Psalm 11:6; Ezekiel 38:22 (in all "" אֵשׁ etc.), compare also Job 18:15; Isaiah 34:9, & Deuteronomy 29:22; ג ׳נַחַל simile for the destroying breath of ׳י Isaiah 30:33.
גֵּר see below I. גור.
גִּר see below גיר.