naive

adjective
1
not showing enough knowledge, good judgement or experience of life; too willing to believe that people always tell you the truth
ساده‌دل, ساده‌لوح, خوش‌باور
2
innocent and simple
ساده‌لوح, معصوم, بی‌آلایش, ساده‌دل, ساده
Their approach to life is refreshingly naive.
compare sophisticated
3
in a style which is deliberately very simple, often uses bright colours and is similar to that produced by a child
کودکانه