From baqa'; properly, a split, i.e. A wide level valley between mountains -- plain, valley.
see HEBREW baqa'
H1237. biqah
בִּקְעָה noun feminine valley (cleft), plain — absolute ׳ב Genesis 11:2 8t.; construct בִּקְעַת Deuteronomy 34:3 7t.; plural בְּקָעוֺת Isaiah 41:18; Psalm 104:8; בְּקָעֹת Deuteronomy 11:11; —
1 valley (opposed to הַר mountain) Deuteronomy 8:7; 11:11; compare Isaiah 41:18; also 63:14 תֵרֵד בַּבִּקְעָח כַּבְּהֵמָה; in creation-poem Psalm 104:8 בְקָעוֺת יֵרְדוּ הָרִים יַעֲלוּ.
2 plain (sometimes valley-plain, broad valley) Genesis 11:2; also Ezekiel 3:22-23, 8:4; 37:1-2,(הַבּ ׳עַלמְּֿבֵי) as level, opposed to סִים הָֽרְכָּ Isaiah 40:4 ("" מִישׁוֺר); elsewhere construct mostly with proper name Deuteronomy 34:3 ׳ב יְרֵחוֺ (appositive הַכִּכָּר), ׳ב מִצְפֶה Joshua 11:8, ׳ב הַלְּבָנוֺן 11:17; 12:7, ׳ב מִגִדּוֺ2 Chronicles 35:22 compare Zechariah 12:11, ׳ב אוֺנוֺ Nehemiah 6:2; אָֿוֶן׳ב Amos 1:5 plain of idolatry = Baalbek (Damascus, according to Wetzst in DeJes 3, 702; ᵐ5 πέδιον Ὤη).