הָבַל (hâbalhaw-bal'verbact emptily)
[Heb] הָבַל ETCBC: הבל‎ (verb|be vain) OSHL: e.af.ab TWOT: 463 GK: H2038 Greek: ἐπιβάλλω, ἐπιποθέω, κενός, ματαιόω
Derivation: a primitive root;
Strong's: to be vain in act, word, or expectation; specifically to lead astray
KJV: be (become, make) vain.