Strong's #3584: kachash (pronounced kaw-khash')
 a primitive root; to be untrue, in word (to lie, feign, disown) or deed (to disappoint, fail, cringe):--deceive, deny, dissemble, fail, deal falsely, be found liars, (be-)lie, lying, submit selves.
Brown-Driver-Briggs Hebrew Lexicon:
 ּׁ 
  kâchash 
 
 1) to deceive, lie, fail, grow lean, be disappointing, be untrue, be insufficient, be found liars, belie, deny, dissemble, deal falsely
 
 1a) (Qal) to become lean
 1b) (Niphal) to cringe, feign obedience
 1c) (Piel)
 
 1c1) to deceive, deny falsely
 1c2) to act deceptively
 1c3) to cringe
 1c4) to disappoint, fail
 
 1d) (Hithpael) to cringe, feign obedience
 
  Part of Speech: verb
Relation: a primitive root
Usage:
This word is used 23 times:
Genesis 18:15: "Then Sarah  denied, saying, I laughed not; for she was afraid. And he said,"
Leviticus 6:2: "and commit a trespass against the LORD,  and lie unto his neighbor in that which was delivered him to keep, or in fellowship,"
Leviticus 6:3: "Or that which was lost,  and lieth concerning it, and sweareth falsely; in"
Leviticus 19:11: "Ye shall not neither  deal falsely, neither lie one to another."
Deuteronomy 33:29: "is the sword of thy excellency! and thine enemies  shall be found liars unto thee; and thou shalt tread upon their high places."
Joshua 7:11: "the accursed thing, and have also stolen,  and dissembled also, and they have put it even among their own stuff."
Joshua 24:27: "us: it shall be therefore a witness unto you, lest  ye deny your God."
2 Samuel 22:45: "Strangers  shall submit themselves unto me: as soon as they hear, they shall be obedient"
1 Kings 13:18: "bread and drink water.  But he lied"
Job 8:18: "If him from his place,  then it shall deny him, saying, I have not seen"
Job 31:28: "were an iniquity to be punished by the judge: for  I should have denied the God that is above."
Psalms 18:44: "As soon as they hear me: the strangers  shall submit"
Psalms 66:3: "through the greatness of thy power shall thine enemies  submit"
Psalms 81:15: "The haters  should have submitted themselves unto him: but their time should have endured forever."
Psalms 109:24: "through fasting; and my flesh  faileth of fatness."
Proverbs 30:9: "Lest  and deny thee, and say, Who is the LORD? or lest I be poor,"
Isaiah 59:13: "In transgressing  and lying against the LORD, and departing away from our God, speaking"
Jeremiah 5:12: " They have belied and said, It is not he; neither shall evil come"
Daniel 10:18: " Then there came again me one like the appearance of a man, and he strengthened"
Hosea 4:2: "By swearing,  and lying, and killing, and stealing, and committing adultery, they break out, and blood toucheth"
Hosea 9:2: "shall not feed them, and the new wine  shall fail"
Habakkuk 3:17: "be in the vines; the labor of the olive  shall fail, and the fields shall yield no meat;"
Zechariah 13:4: "shall they wear a rough garment to  deceive:"