Strong's #2509: chalaq (pronounced khaw-lawk')
 from 2505; smooth (especially of tongue):--flattering, smooth.
Brown-Driver-Briggs Hebrew Lexicon:
 
  châlâq 
 
 1) flattering, smooth
 
  Part of Speech: adjective
Relation: from H2505
Usage:
This word is used 4 times:
Genesis 27:11: "is a hairy man, and I  am a smooth man:"
Proverbs 5:3: "drop as a honeycomb, and her mouth  is smoother than oil:"
Proverbs 26:28: "tongue hateth those that are afflicted  by it; and a flattering mouth worketh ruin."
Ezekiel 12:24: "any vain vision  nor flattering divination within the house"