-fəl adjective
1. : having or showing distrust : suspicious , wary
vigilant and distrustful superintendence — Thomas Jefferson
a man of distrustful nature
my experience as a judge in other fields of law has made me distrustful of rules of thumb generally — B.N.Cardozo
2. archaic : causing or arousing distrust
• dis·trust·ful·ly -fəlē, -li adverb
• dis·trust·ful·ness -lnə̇s noun -es