trustingness

People often mistake his trustingness for naivety.

人们常常把他的信任他人的特质误认为是天真。

There is a certain trustingness in the way she talks to strangers.

她与陌生人交谈的方式中有一种信任他人的特质。

Her trustingness led her to lend money to a man she had just met.

她的信任他人的特质让她把钱借给了一个她刚认识的人。