from an unused root perhaps meaning properly, to pant (hence, to exert oneself, usually in vain; to come to naught); strictly nothingness; also trouble. vanity, wickedness; specifically an idol; affliction, evil, false, idol, iniquity, mischief, mourners(-ing), naught, sorrow, unjust, unrighteous, vain, vanity, wicked(-ness). Compare אַיִן.