H7406
רֶ֫כֶס
roughness
1) roughness or bound up, impeded, the impassable or mountain chain, rough place 1a) meaning uncertain
Full Brown-Driver-Briggs lexicon entry
[רֶ֫כֶס] noun [masculine] dubious; perhaps roughness (of ground; ? literally binding, knot); or bound up, impeded, i.e. the impassable; or mountain-chain (see Thes); — plural הָֽרְכָסִים Isa 40:4 (|| הֶעָקֹכ; opposed to בִּקְעָה).
1 occurrence