Or sob {obe}; from an unused root meaning to cover; properly, equivalent to ab; but used only as an architectural term, an architrave (as shading the pillars) -- thick (beam, plant).
see HEBREW ab
H5646. ab
or ob I. עָב, [עֹב] noun masculine architectural term, meaning unknown; projecting roof is conjectured (Sm Co Berthol); others landing (Da); AV RV thick beam or plank, RVm threshold; Benz Kit Toy leave untranslated; in any case a structure of wood; — absolute וְעָב וְעַמֻּדִים 1 Kings 7:6; apparently construct מֵהַחוּץ הָאוּלָם אֶלמְּֿנֵי עֵץ וְעָב Ezekiel 41:25; plural (si vera lectio) הָעֻבִּים 41:26.
II. עָב see עוּב.