deceitful, treacherous, deception, lie, deceptive, disappointing

Root √כזב: כָּזַב vb lie be a liar Qal Pt . Niph his hope has been made deceptive . Pi lie tell a lie , disappoint fail . Hiph will make me a liar . who? i.e. prove me to be so .

אַכְזָב adj deceptive disappointing .