Distrustful

I was distrustful of his motives.

Her father's constant disappearances made her distrustful around men.

Here sat Marilla Cuthbert, when she sat at all, always slightly distrustful of sunshine, which seemed to her too dancing and irresponsible a thing for a world which was meant to be taken seriously.

What's the name of the man who made you so distrustful of the entire male gender?

Don't be distrustful.

I'm pretty distrustful.

She is distrustful.