Etymology?:
from the same as šōʾ שׁוֹא ‘ravage / devastation’ in the sense of desolating
Roots:
שׁוא שׁואה שׁואה
šāwᵊʾ n, m
1) emptiness, vanity, falsehood
1a) emptiness, nothingness, vanity
1b) emptiness of speech, lying
1c) worthlessness (of conduct)
Mentioned in Exodus 23:1, 20:7 Deuteronomy 5:11, 5:20 Isaiah 1:13, 59:4, 30:28, 5:18 Jeremiah 46:11, 2:30, 6:29, 4:30, 18:15 Ezekiel 13:9, 13:8, 22:28, 21:34, 13:6, 13:7, 13:23, 12:24 Hosea 12:12, 10:4 Jonah 2:9 Zechariah 10:2 Malachi 3:14 Psalms 60:13, 89:48, 108:13, 41:7, 127:2, 12:3, 31:7, 127:1, 139:20, 24:4, 144:8, 144:11, 26:4, 119:37 Proverbs 30:8 Job 11:11, 35:13, 15:31, 31:5, 7:3 Lamentations 2:14