1The guileless expression on her face made it impossible for him to suspect that she was hiding anything.
2Is it possible to be both guileless and effective in a cutthroat business environment?
3The artist's guileless portrayal of rural life was a refreshing change from the cynicism of modern urban art.
4Avoid being too guileless in your dealings with strangers; a little caution can go a long way.
5There is something profoundly attractive about a guileless personality, untainted by the cynicism and world-weariness that often accompany age and experience.