guilelessness

她的朴实让所有人都愿意信任她。

Her ___guilelessness made everyone willing to trust her.

在充满算计的商界，他的朴实显得格外罕见。

In the calculating business world, his ___guilelessness seemed especially rare.

孩子的朴实往往能融化成年人内心的防备。

A child's ___guilelessness can often melt the defenses in an adult's heart.