guileless russian

• простоду́шный

  open-hearted, simple-hearted, guileless, artless

  naive, simple-minded, unsophisticated

• нехи́трый

  simple, plain, uncomplicated, primitive

  straightforward, guileless, artless

• нерасчётливый

  wasteful, extravagant, improvident

  imprudent, incautious, ill-considered

  not calculating, guileless, not self-seeking

• простоду́шие

  open-heartedness, guilelessness, ingenuousness, artlessness

  simple-mindedness, naivety

• простосерде́чие

  simple-heartedness, openness, frankness, sincerity

  artlessness, naivety, guilelessness