"distrustful" in the adjective sense
having or showing distrust
"a man of distrustful nature"
"my experience...in other fields of law has made me distrustful of rules of thumb generally"- B.N.Cardozo
"vigilant and distrustful superintendence"- Thomas Jefferson
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License