Reqah (H7382) is the feminine form of riq/req β emptiness. It describes something hollow, devoid of value, without substance. Its theological import lies in the contrast it creates: human striving without God is reqa, but life oriented toward God overflows with meaning and substance.
Judges 9:4 and 11:3 use it for worthless, reckless men. Isaiah 29:8 uses the related root for a hungry man who dreams of eating but wakes empty. The image of emptiness without God runs through all of Scripture, culminating in Ecclesiastes' hebel (vapor) theme. James 2:20 echoes this in Greek: 'Do you want to be shown, you foolish person, that faith apart from works is useless [empty]?'