deceitfully russian

• лживо

  falsely, deceitfully, mendaciously, untruthfully

• преда́тельски

  treacherously, perfidiously, deceitfully

• подтасо́вывающий

  rigging, falsifying, manipulating, shuffling (deceitfully)

Examples

• Он лживо улыбнулся и промолчал.

  He smiled deceitfully and said nothing.