כָּחַשׁ
From LSJ
Ὀργῆς χάριν τὰ κρυπτὰ μὴ ἐκφάνῃς φίλου → Arcana amici ne per iram prodito → Geheimnisse des Freunds verrate nicht im Zorn
English (Strong)
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.