Strong's H2519חֲלַקְלַקָּה: properly, something very smooth; i.e. a treacherous spot; figuratively, blandishment KJV:flattery, slippery.
Meanings: Brown-Driver-Briggs (1906) and Strong's Hebrew Dictionary (1890), public domain, via the Open Scriptures Hebrew Bible Project (CC BY 4.0). TWOT numbers for reference only.
Root family 670: חָלַקḥālaq — be smooth, slippery; make smooth; apportion, separate; deal, distribute, divide, flatter, give, part, partner, take away a portion, receive, separate self, smoother