Lexical Definition

‎רֶכֶס‎ rekeç (reh'-kes) roughness H:N-M
from ‎רָכַס‎

rough place.

1) roughness or bound up, impeded, the impassable or mountain chain, rough place
1a) meaning dubious

See Greek: τραχύς

Usage: 1 form in 1 verse
Form Translated As     In Verse(s)
וְהָרְכָסִ֖ים and the rough places Isa.40.4

Brown-Driver-Briggs

[‎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).

Brown-Driver-Briggs References

Book Refs
Isaiah 40:4