deceitful: P. and V. διπλοῦς, P. ἀπατηλός, Ar. and V. δόλιος.
secret: P. and V. κρυπτός, λαθραῖος, κρυφαῖος (Plato), V. κρύφιος, σκότιος.
in an underhand way: Ar. and V. δόλῳ, V. ἐν δόλῳ, σὺν δόλῳ.
secretly: P. and V. λάθρα.
