kāḥaš כָּחַשׁ ‘to deceive’ (Hebrew)

Etymology^?: a primitive root

kāḥaš v
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