guileless
adjective
[ ˈɡʌɪlləs ]
• devoid of guile; innocent and without deception.
• "his face, once so open and guileless"
Similar:
artless,
ingenuous,
open,
honest,
sincere,
genuine,
naive,
natural,
simple,
childlike,
innocent,
unsophisticated,
unworldly,
unsuspicious,
trustful,
trusting,
honourable,
truthful,
frank,
candid,
straightforward,
forthright,
unaffected,
unpretentious,
on the up and up,