#1891 הָבַל habal {haw-bal'}

 a primitive root; TWOT - 463; v

—Hebrew Word Study (Transliteration-Pronunciation Etymology & Grammar)

 1) to act emptily, become vain, be vain
    1a) (Qal)
        1a1) to become vain
        1a2) to be utterly vain (with cognate acc)
    1b) (Hiphil)
        1b1) to cause to become vain
        1b2) to fill with vain hopes

—Brown-Driver-Briggs (Old Testament Hebrew-English Lexicon)

—Strong's (Hebrew & Chaldee Dictionary of the Old Testament)

—NAS Exhaustive Concordance of the Bible with Hebrew-Aramaic and Greek Dictionaries

 AV - become vain 4, make vain 1; 5

—Exhaustive Concordance (KJV Translation Frequency & Location)