guileless

1. ADJ If you describe someone as guileless, you mean that they behave openly and truthfully and do not try to deceive people. 誠(chéng)實(shí)的[書(shū)面]

Joanne was so guileless that Claire had no option but to believe her. 喬安妮如此誠(chéng)實(shí)，所以克萊爾除了相信她以外沒(méi)有別的選擇。