Lexical Definition

‎מֶרְחָב‎ merchâb (mer-khawb') broad H:N-M
from ‎רָחַב‎

breadth, large place (room).

1) broad or roomy place, wide, expanses

Usage: 5 forms in 6 verses
Form Translated As     In Verse(s)
לַמֶּרְחָ֖ב to roomy place 2Sam.22.20
לַמֶּרְחָ֑ב to roomy place Ps.18.19
לְמֶרְחֲבֵי to expanses of Hab.1.6
בַמֶּרְחָ֣ב in roomy place Ps.31.8Ps.118.5
בַּמֶּרְחָֽב in roomy place Hos.4.16

Brown-Driver-Briggs

‎מֶרְחָב‎ noun [masculine] broad, roomy, place; — absolute ‎׳‎‎מ‎, of pasture Hos 4:16 (in simile); figurative of freedom from distress and anxiety 2Sam 22:20 = Ps 18:20*; Ps 31:9*; Ps 118:5 (ᵑ0 construct in ‎מֶרְחַבְיָה‎ spacious place of Yah, i.e. extraordinarily spacious, < ‎מֶרְחָב יָהּ‎, ‎יָהּ‎ being subject of verb); plural construct ‎מֶרְחֲבֵיאֶֿרֶץ‎ Hab 1:6 expanses of the earth.

Brown-Driver-Briggs References

Book Refs
2 Samuel 22:20
Psalms 18:20* · 31:9* · 118:5
Hosea 4:16
Habakkuk 1:6