From an unused root, probably meaning to house in; a kind of tree or wood (as used for building), apparently the cypress -- gopher.
H1613. gopher
גֹּ֫פֶר noun [masculine] gopher, only in עֲצֵיגֹּֿפֶר Genesis 6:14 (P), wood of which the ark was made (word dubious; Thes compare כֹּפֶר & so Rob Ges (hence 'pitch-wood, resinous wood'), compare Di; LagSemitica i. 64; Symmict. ii. 93, BN 217 ff. thinks word not original, but inferred from גפרית, and substituted here for גפרית by copyist, or editor. compare following).